Help with new bike (and sizing)

[Jolt]

Lots of people here seem to like the Jamis Coda, which is a flat-bar road bike and very reasonably priced. You might look at that too. Never ridden one myself, but I have heard only good reviews.

[Crankin]

I had a Coda and one of my friends had a Vita. They both are great entry level flat bar road bikes. The Coda is cheaper, I believe.
You won't go wrong with either.