Hey shortthrow, it looks good except for the PS.(sorry Nos) The HDD is ok but try to get a Sata2 -16mb buffer version from WD though.
This is not to knock Aspire PS but read the reviews on Newegg, not so good. Try for a Silverstone instead,
notice the reviews...
to save money you can get the 3800 instead(not much diff between 4200 and 3800 in real life)
and as to a case check these out they are very nice for the money($39)
they come in Red,Blue and Black
I used one for one of my builds and everyone loved it.