I've been reading about how great it is to ride a fixie and how it helps your pedal stroke and improves your road riding abilities and I'm sold. Plus, it'd be nice to have a bike in the stable that I can just jump on and ride.

But which bike? I think I'd prefer something like the IRO Jamie Roy over a dedicated track bike. Are there other bikes like IRO that I've missed? Are the Lemond Fillmore or the Fisher Triton worth a look? And if I did order an IRO, which upgrades are worth it? The upgraded wheelset seems to be a good idea but I know nothing about anything else.