TBH for SS, I'd go for something like the Windsor Clockwork. Since it comes with front/rear brakes and a freewheel cog. The Kilo TT won't come with these.

Although since you say you've never wrenched on a bike before, a Bikes Direct bike may not be the best choice for you. You may want to head to your local LBS to see what affordable single speeds they have. At least if you buy from an LBS you will have some kind of support. When you buy from Bikes Direct, you pretty much have to take the whole bike apart and rebuild it. I mean, I guess you could always pick up a Bikes Direct bike and take it to a shop to look over, but that's kinda just bad juju.

As for gearing, it's different for everyone and how hilly your area is. I think a good place to start is around 70gi (gear inches).