Did that $800 including a LCD monitor? If not, then I'd say that you were
probably ripped off.
You don't happen to know your computer's specifications do you?
If you have a relatively modern motherboard, you can just get a new video
card to replace the crappy one the person who built your computer put in the
computer.
I mean it depends on what you need Vista to do. You can get a cheap video
card on ebay for $50 or you can get the nVidia E-VGA 8800GT for $250 and
that'll run every single game that's on the market very well. You should
wait until after February when the nVidia releases the 9 series of video
cards so the 8 series cards' prices will drop I hope. You'll want to make
sure that your motherboard can actually use the 8800GT though. You'll need a
PCI express X16 port with at least PCI express version 1.1 support because
the 8800GT isn't really compatible with PCI express version 1.0. Or so I've
heard.
Aero doesn't really take a lot to run. I've turned Aero off before and I
find that it doesn't really add to subtract from the overall aesthetics of
Vista. It's really the whole graphics experiences that's pretty good. It
doesn't really matter if you can see through the windows like it's glass.
Although it's kind of neat.
By the way, if you get a cheap video card, make sure that it's at least like
the 7 series of nVidia or something. I forget just what shader model you'll
need for Vista Aero. I can't imagine it's very high. They're up to shader
model 4.1 now so the higher shader model the better.