I'm a Roadie now

So I've already briefly mentioned my latest ebay purchase. Here are some more details: It's a 2002 62cm Gunnar Roadie frameset. The price was just under 400 dollars (including shipping) and this was as much as I was willing to pay. Right now--of course--I'm making plans on how to build it up. For lack of funds, I'll go the used-but-good  route and have already spent a large part of the day on ebay. Some decisions have been made: SPD pedals to match my current shoes. Shimano 105 or better for the drivetrain. I already have a front wheel and will build up the rear wheel with a used hub on a new Mavic Open Pro rim. But the rest is pretty much unclear still. 9 or 10 speed? Compact or triple? Saddle? Handlebars? Brakes? Brake/shift levers?? Lots of choices to make. But I'll go slow as I definitely have more time than money.