Discs rock. I wouldn't commute on anything but.

Heh. I own or have ridden alot of the bikes on your list. My views:

BBU - sweet bike,can take 700 or 26" wheels. Suspension can be locked out. Mounting front fender a pain due to air chuck for Headshok.
Sub 10 - very similar to my Pt Reyes. See below.
Coda - very nice ride;steel frame + carbon fork = sweet. Fast and good handling. Will take wider tires.
Dews - great all-rounders. Think rigid MTB w/700cc wheels. At home on street and trails. Can take wider/narrower tires depending on need. Deluxe is the better deal for the price.
Pt Reyes - mine in an '04,which is spec'd better than the current models(equal to Sub 10). Great handling bike. Will take fenders and wider tires. Mine doesn't have a carbon fork,but still rides good,so the current model's carbon should really smooth things out.
Buzz - awsome urban toy. But stock gearing is low,and you can't fit full fenders unless you go down to 1.5" tires.
Route 24 - nice enough for the price,but kind of heavy.
SU200 - never rode one,but not digging the straight blade alloy fork.

For what you're looking to do,I'd suggest the Coda or one of the Dews. The BBU is nice if you can afford it. If you'd like more in depth reviews,let me know. Also,if you need more hand positions,or want to cheat the wind,all of these bikes wll take a trekking bar.

idcruiserman: test rode a Trek Portland,which has the same fork as the Poprad. Hated it. So rough it felt like the fork was alloy. Hopefully the Poprad's steel frame makes up for this,but with the hills in DC I'm no big fan of cross gearing.