I traded my '04 Z4 2.5 in for my current '05 SRT6. I miss some of the features of that car. For one the roof, I now have a coupe. There are little touches like the auto dimming mirrors (really miss those) and the super smooth I6. However the SRT6 makes me forget all that...FAST!

The Z4 steering is electrically assisted and a little too light for me. I truly prefer that of the SRT (the M models do away with the electric assist).

I have taken both out on the track. This is one of the key reasons why the SRT is in my garage. I realize that it would be fairer to compare the SRT to the M but I didn't have an M.

I was looking at major upgrades to the Z, supercharger, suspension, wheels and tires. Total $20 grand plus or just get a new Z4 M (my car plus another $24K plus) So when the $28K "new" (670 miles) SRT came available, it took only $2K cash and the Z4 put the SRT in my garage.

When I start to miss the Z4, I just push a little harder with the right foot, it always brings a little smile to my face.