Just my .02, but I think the 03 Cobra would be a better car. It has the 4V vs the 2V and it's "built" from the gound up to handle the blower, vice adding one to a stock engine. Hey, I love my Roush and wish I had an S3, but If I was buying new in 03, I think I would go Cobra -- although, I prefer an auto. As for future mods, they both have roots blowers, so I think the options would be the same. One other thing, the Cobra has the new 6 speed!