I bought a new S2000 (AP1) in 2001. I loved that car, other than the lack of torque (which doesn't seem to bother me much in the Lotus). My friend has an '01 AP1 just like my old one, about 85,000 miles on it, feels tighter than my '06 Exige with 35K on the clock for damn sure. It's interesting driving them back to back, the S2000 feels almost luxury, and very tame/soft/quiet. I'd still like to have one, you know, as a daily, but for a toy the Exige suits me much better.
LOTS of guys here have had both, and personally, I don't think you can go wrong with either car.