Suggestion please : 4 seats, comfortable, now roof 500+ BHP, no missiles

Slightly short of your 500 BHP, but not much ! Low mileage one like this will be like new !
https://www.pcarmarket.com/auction/2...artin-vantage/

I hadn't realised the DB9 had rear seats so might check it out. The last AM I looked at was a V12 DB7 which looked beautiful but the interior appeared to be made from an Airfix kit with some leather glued to it. I hope the DB9 is better. I will see what I can find at the weekend to have a try. The wife still doesn;t want me to look at the Maserati which is the obvious shoice

Okay, if taste is no barrier, how about one of these -

https://www.overfinch.com/models/ran...-by-overfinch/

Okay - there are a few cars that are 'out' due to repeats or disinterest and the 4x4 / SUV is one entire category that gets removed. Unfortunately it seems to be the one where most car makers have been investing their time and effort recently.

S-Class Cabrio - Wife wants one because she likes Mercedes but I had the V12 CL and have the silly SLK so it will possibly feel like just another fast taxi.

Bentley GTC - The more reviews I read, the more I wonder why no-one seems to be able to run one for more than 18 months without a £1,000+ fault developing on toip of standard maintenance

Porsche Panamera - No cabrio but also anything less than the Turbo seem to drive like any other big heavy saloon. I don't want to need to check the badge to see if it is a Porsche or an Audi

Maserati GranCabrio - This is what started the idea. I have always wanted a Maserati for no rational reason I can think of. Unfortunately the first time I got within 2 days of buying one I snapped my foot off and it took 6 years to 'recover'. I then tried again in 2020. I found a great car and test drove in on March 4th, negotiate on price and struck a deal on March 20th and agreed to finalise and collect the car on Friday March 28th - then lockdown closed the UK on March 26th so it never happened. I am worried that if I try a third time the Earth will be hit by a giant meteor or something.

Okay, I'm liking your thinking on the Maserati as I'm quote prone to buying things just because I want to myself.

I also hadn't realised that Overfinch seem to have gone from a high performance tuning company to a business that adds extra bling to the most blingy cars currently available out of the box, so sorry for posting that link.

I know you're looking for a 500+bhp convertible with four seats, but that's a big ask due to the structural rigidity of a convertible not being as inherent as it is in an enclosed shell, so there really aren't going to be many production cars that fit that brief.

Depending on your budget, you could commission a Stateside Hot Rod & Custom Garage to build you a big four seat American cruiser with Auto transmission, A/C, cruise control and a 500hp V8, then have it shipped over here. That would definitely get you some positive attention, just be careful in the corners.

Alternatively, our American cousins offer some pretty impressive high performance coupes these days, and if you really want the mostest power in a production car, then take a look at the Dodge Demon -

https://www.classic-trader.com/uk/ca...on/2018/126097

As standard it was a single seater, but you could tick the options list for a front passenger seat, rear seats and a carpeted trunk for the eye watering price of an extra $3. Yes, that really is three bucks for three more seats and a carpet.

Good luck with your quest for awesome power!

You don't need one, rational reason that is.
I got one after I'd answered the question- "What car would I LIKE to drive?"
Just remember to check for biscotti front suspension mounts.

It may go back to having owned one of these a few years ago:

A friend of mine has a GranCabrio, nice car, sounds great when you give some welly. It's a big car and the styling isn't anything special other than the front end grill and badge. I don't like the factory fitted button that bypass's the exhaust silencers, thought that was what a "Kevin" type youth would fit on his Ford XR3 in 1985 !

I like the look of these, maybe an option......
https://www.motor1.com/reviews/42052...driving-notes/

BMW 8 - another good call. I should be able to pick up something within the £40-£50K budget. I will ponder on until I get the Barchetta ready for sale

6 Series worth a look too, especially the "M6" version.