Since you're used to the BMW's smoothness, the 1.8T engines will probably come as a big disappointment. Having owned an Audi 1.8T in the past, I was never thrilled with it's performance, especially in hotter weather. The turbo lag just plain sucks. The VW 1.8T has the same engine - you could chip either car, thats true. But there are downsides to doing this such as voiding the warranty, and reliability of the turbo becomes a big question. And you're still stuck with the turbo lag.
But if you like 4-bangers and turbo's, etc - Have you considered the Benz C Coupe?
Supercharged 4 cyclinder, rated at 190hp. Seems like a fun car, and starts around 25,000. Can get pricey with options, but you can pick and choose. MB has a car config website, and there are extensive options for this car.
Otherwise, I think the GTI VR6 is a really fun car. The VR6 engine is potent, but the suspension needs work. On the flip side, for commuting, the suspension would be a lot more comfortable. The GTI VR6 also comes loaded with all the toys. I though I heard that it will soon be offered at 200hp. But I'm not sure. I'd still take the 174hp 6 over the 1.8T anyday - smoother and more torque. (Rumor has it that in 2004, VW will offer the GTI with AWD and the W8 engine. Now that will be interesting!)
I would also consider the Acura CL, type S with the 6 tranny. Again, a lot of bang for the buck, more comfort than sport, and RELIABILITY if you're going to do a lot of commuting miles.
But if you like 4-bangers and turbo's, etc - Have you considered the Benz C Coupe?

Supercharged 4 cyclinder, rated at 190hp. Seems like a fun car, and starts around 25,000. Can get pricey with options, but you can pick and choose. MB has a car config website, and there are extensive options for this car.
Otherwise, I think the GTI VR6 is a really fun car. The VR6 engine is potent, but the suspension needs work. On the flip side, for commuting, the suspension would be a lot more comfortable. The GTI VR6 also comes loaded with all the toys. I though I heard that it will soon be offered at 200hp. But I'm not sure. I'd still take the 174hp 6 over the 1.8T anyday - smoother and more torque. (Rumor has it that in 2004, VW will offer the GTI with AWD and the W8 engine. Now that will be interesting!)
I would also consider the Acura CL, type S with the 6 tranny. Again, a lot of bang for the buck, more comfort than sport, and RELIABILITY if you're going to do a lot of commuting miles.