I'd go for the ST200, if you can find a nice one anyway.

If it was between the ST24 and GSI, I'd possibly lean towards the GSI, but not compared to the 200.

I've been in all of em plenty, and whatever the Vauxhall fans say, the Ford rides better, handles better, looks better, is better built, better interior, it's just no contest. The ST200 sounds just as good, and has better seats, full leather in a lot of cases.

I like the GSI, but I still think the ST200 is a cut above it.