I would agree, definetly get the 1999.5 or the 2001 1.8t Quattro. I almost regret getting the FWD 2.8 now becuase of the low list of avalible mods and without the AWD its almost not worth it, beacuse you burn through 1st and some of second with any added power(I found this out the hard way). The only bright side of the FWD is that it doesnt cost nearly as much to repair any suspension damage, I have a friend with a 2.8Q and it costs him almost double what it costs me for any suspension maintenence on his Q.
When you do buy, make sure you get the timming belt changed/checked-these cars have notorious problems with this. Also make sure all the control arms and bearings on each are fresh or do not need any tending, this also can be a very expensive problem to fix. I had a timming belt break on a previous Audi A4 and it cost me almost $3,000 to fix it.
These are fun cars, I dont know how much fun compared to a 350z, but definetly costs less!
Good Luck