The Griffith is a great car, fast, brutal power delivery, twitchy, awesome sound, convertible.
Its brilliant as a fun car.
If I could only keep one, it would be the Supra, no question.
Its just so much more versatile. It's nearly as quick as the Griff, and you can take it out in the rain and get traction, unless you drive like a loon
Coupled with that, I expect the Supra to start, I think the Griff will, and so far it's never let me down, but I'd never be too surprised if it didn't one day.
I suppose for every hour I spend working on the Supra, I must spend 3 or 4 on the Griff. I don't mind, its what I expected, but I wouldn't want to have to do it in order to get to work the next day.
If you can use the Elise as an everyday car, you're not in a bad situation and a TVR may well fit into your lifestyle OK.
Once you've owned a Supra, its a very hard car to replace. I really haven't got a clue what I'll replace mine with when the time comes, except a later Supra, but being that there aren't that many 2002 cars around, its a bit like looking for hens teeth.
If you do buy a TVR, FFS buy on condition and not price, there's a hell of a lot of poor condition cars around just waiting for the inexperienced (of TVRs) to fall into