Have to agree with Worzel - if you have the cash go for a 320. You just have to look at Jay's to see what a truly beautiful car it is. If you have slightly less and want a newage then look at the WR1. It has a great spec. There seems to be a few up for sale at the moment. As mentioned the S203 and 204 are nice, but look to be overpriced IMHO.
If you want to go lighter with a classic - 22B's are great, but the best value for money has to be a P1. RAs are great fun especially if you get the chance to take it on the track
See what you've started! They're all very good to be honest and it depends on your budget and what you want from the car. Wouldn't it be great to do a back-to-back test in each?
Ideally one of each would be nice.....