Wheels: Radial is pointless unless you are a slave to fashion, and love that fashion. But that's just, like, my opinion, man.
Hubs: I love the formulas. High or low flange is really a matter of style and how much of a weight weenie you are. Fixed-fixed is better than fixed-free, you can still put a freewheel on the fixed threading.

Bars: I really doubt that anything Nitto makes is crappy enough to lose it's shape. I doubt I would ever notice the difference in stiffness.

Cranks: 75's are the standard, and the cheapest way to get a 144 bcd. Otherwise, you'll need to get a road crankset (usually 130bcd) or stronglight or miche track cranks (130 and 135 bcd respectively).

BB: If you go 75's, any shimano cartridge BB will do you fine. UN52/72 of the appropriate spindle length. Miche's will need one with an ISO taper though (Sugino and Shimano are JIS). Stronglights, I don't know.

Headset: Any base sealed-cartidge model will do fine, probably. I thought the fork on those was threaded though?

Stem: Once you get your angle and length figured out, nothing beats a thomson, except maybe a cinelli alter or 3T mutant. Salsa Cro-mo stems are pretty tight too.

Seatpost: Nothing sexy I can think of for less than $40 in a 26.8... but it's a freaking seatpost, you know?

Saddle: Extremely personal decision. Nobody can tell you what to do there.

Pedals: covered.

Cogs/Lockring: All are good, but I don't think a Phil will work on formula hubs. I've been using a Surly for well over a year with no bad stuff happening.

Chain: KMC whatever BMX chain is good and stout.

Brake: Zero Gravity makes some nice ones... Nashbar sells cheapies too. No road brakes are going to be huge.

Tires: Vittoria Rubinos get good reviews on here, and you can pick your color.