...the BMW Z4? And what do you want more in street racing

Street racing... you got to be kidding! Buy either one of these slugs, turbo charge it, send me an email and I'll race you for pinks or what ever amount you want. Street racing is illegal anyway, I'll meet you at my local drag strip! Bwahahahaha.... better for street racing..... hahahahahaha... apparently you haven't been around street cars that do 11's on street tires and even faster on slicks!

Well, the Pontiac is cheaper, easier to modify for power, easier to work on, cheaper insurance, regular gas.

The BMW Z4 is more powerful, faster, and handles just a bit better. You would not notice the difference in handling. It uses premium gas.