one of my girlfriend's bikes is an 07. it's modified, but she loves it. got quite fast on it, too.
if you're going to upgrade, though, don't bother with an aerospoke.
i take it you're a small person-- making your bike heavier is probably not something you want to do, especially not as a beginner dealing with hills. there are smarter (and less obvious) ways to bling.
i'd start with something like a carbon fork (the track's fork is kinda heavy and stiff, not fun or forgiving on the road) and go to the drivetrain next.

in fact, skip the bike altogether. the more i think about it, the more i realize that the only thing worth salvaging is the frame. the drivetrain is RPM junk; you can do much better for the price. there's a thread about inexpensive bikes in this subforum.
for instance, check this thread. you'll get a similar quality bike for much less, and have more money to spend on upgrades.