If you are considering buying this car, good luck finding it for the dealer retail or private party value on Edmunds. If you do find it at that price, it's a lemon. These cars are rare and worth the premium! Mine is a Laguna Seca w/13K miles. Build quality issues not yet encountered but I did previously own an 00 M Roadster and a 2003 M3 Conv and agree the M Roadster did have more quality problems (last one had 70K miles). M3 did not have such problems. It's funny watching Porsche Boxter S's disappear in the review ;-) Gorgeous, rare, stunning appearance, gobs of power at high revs (downshifts needed @ high speeds, could use a 6sp but still a fantastic ride) - grab one if you see one!
S54 Engine, S54 Engine, 315HP, 251FP/Torque, S54, did I mention the S54? Stunning looks, fast power drop- top, two-tone interior color combo. You will dust almost anything on the road short of a new 06 M5/M6 or a Corvette Z06. Great exhaust (way better than the M3 but not as good as the S52)
Rear suspension will fly out w/out DSP on - unless you're a pro, keep the DSP on. Needs sport mode like the M3 (this can be modified by a BMW shop). Give it a 6sp, maybe 85 more HP, lowered an inch more, still suffers from poor paint. Extreme - but you can tell BMW left some on the table :-)