This is a good one!
As James Ruppert has said the insurance is going to be the killer for you, but this doesn't mean that you can't have something a little interesting. My main concern is that you appear to be looking at "Premium" brands, Mini, BMW etc, but again this also brings insurance issues. I have a couple of suggestions however that may light your candle.
1. Honda Civic Type S 1.8 - Quick little motor this one, but it is an aquired taste. Looks "sporty" enough and is in that funny mid "Not quite premium but a cut above Ford etc" range. Insurance group 9 should be kind on the pocket too.
2. Hyundai 2.0 Coupe - Cheap coupe with reasonable performance. Not premium but in a different league your average hatch. Insurance group 10.
3. Renault Megane GT - Living under the halo of the 225, but you have the choice of a petrol or diesel. Diesels the best bet at group 10 insurance, and if you wanted to be really bad you could "tweak" the diesel easier!!
4. SEAT Leon 2.0TDI Sport - Smarter choice than the Golf and an infinitely more interesting car. Group 9.
5. Suzuki Swift Sport - Already suggested by James, and probably my personal favorite. Group 9 and it will have you smiling forever!
6. Vauxhall Astra Sport Hatch 1.8 SRi - Bit more main stream but still very cool. Half decent kick and just Group 8.
There are probably several more idea, but these are just some off the top of my head. Best of luck, and it will be interesting to hear what you actually go for.
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