The Princeton tec looks like a strong choice. I admit I have no experience with their product. For a winter race I think that yukon would probably be a better choice. I have learned to be leary of lumen rating and batt life ratings as those ratings may "optimal conditions" but I am going to have to look into that Yukon headlamp.

I would look at the fenix ld 20 for a bar light. As far as a headlamp. I just purchased a fenix HP10 to use for a 24 hour race. I used an LD 20 all last winter in Winnipeg Canada and it is an excellent light. All aluminium parts, AA batts with 2 fish light block is simple and bomber. The HP 10 is really bright but heavy (I have no experience with the hp 11). I crashed in the night at the 24 hour event and had an issue with it (the click mechanism that holds the head up disengaged, fixed it later at home but it is a plastic part). I strapped another LD 20 to my helmet and it worked well.

The petzl headlamps are not as bright but i think are a little burlier. the fenix LD 20 is an awesome light.

For something remote like the ITI I would seriously think about an LD20 on the bar and another on the head with the fenix head strap.

my $0.02

this is the setup I am working on

http://www.fenixtactical.com/fenix-ld20.html

A friend of mine with night blindness used this setup at Primal Quest South Dacotah with good success.
 
Up to 180 lumens down to 9 lumens. 2 AA batts twofish lockblocks to handlebar. simple bright tough

I've tried BLT firewire (good light, bad bracket) Minewt (bright light, short burn, only rechargable) Petzl headlamps (myo xp and duo, great burn and battey availably not enought lumens )

Just need to see how this setup works in the cold. Regulated output lights have problematic in the winter here.

my two cents
Craig