Sounds like yer doin' an Aplus job so far. Nice looking bike, too.
I wanted to add one point in the convo. It's been said, but not directly. You probably don't need the difference you'd get by going Campy, or upgrading to a nicer gruppo at this point.
The fancy stuff is real nice when you are riding 5-10K miles per year, or more, or yer racing. Until you've got loads of experience, and until you are pushing your existing setup to the limits, you won't notice a lot of the differences talked about here. 105 is good gear. It'll work.
So, when you start trying to beat everyone to the finish on the group ride, or hang with the first guys to the top of the climbs, so long as what you've got is comfortable, you've got yourself a good ride. You start trying to hang with the local strong men and fast boys, then a missed shift will hurt, and you'll want to upgrade.
My commuting bike isn't even 10 speed, not to notice that the cogs and the rear derailleur don't match (different groupsets). Meh, it works ok. It messes up in the top gears on a regular basis, but since I'm not in a hurry, no biggy.