I have the opportunity to get a fairly nice aluminum road frame w/carbon fork for an excellent price. I already have the road bike that I want, but I was thinking of using this frame for a single speed. I already have some components that I could use:

Mavic Open Pro wheels (28 spoke)
Easton stem and bar
I have several saddles to choose from

I would mainly use the bike to commute on. It wouldn't take much of a beating, 90 percent of the commute is on a fairly new MUP.

What do I need to consider in this type of a conversion? Any suggestions on a seatpost or crank set? Thanks in advance for your responses.