325i Vs 525i

Everyone says that the 325i is quicker than the 525i because of weight. But call me crazy, I think my 5 is alot faster than my e30 ever was. Passing acceleration, everything. Its just an all around better car. Wich tuners do you guys recommend, DINAN?? BAVARIAN AUTOSPORT?? thanks guys. BTW. I am think of getting the m parallel alloy wheels from a 7 series sport. any comments. thanks
Stephen Merrill

bav auto is not really a tuner, they are more of an aftermarket part supplier.