Ah ha! I'm not into singlespeeds but I do know of one person with that frame and they're quite happy with it so far. I don't know of his exact setup though since he changed it recently. Unfortunately he's comparing the singlespeed setup to his old 80's Trek so it might not be a good comparison.
Jenson USA is an excellent retailer and I haven't had any problems with them and I think I've spent around $1500 US through them so far. Hopefully I won't spend much more. Gah.