Really nice that, love how the coupon feature works very classy. If it were me I would have preferred it to be a little bigger personally, I love websites that are section in the middle (great designing them too because it's so much easier getting them to work on all screen sizes) but I would have liked it a tad bigger, maybe an inch either side at the most?
Also the black that you've used on certain pages i've always liked to designs pages where i've needed a dark background by selecting the black in photoshop and dragging the marker down just a tad so that it's not a solid black, it'll still be black but a smoother easier on the eye shade of it. It probably wont be a web colour that way but might be close enough to work.
the menu or the buttons I might be tempted to make the rollover a little more noticeable (just a tad) when I clicked on certain things I had to click twice to make sure it was selected as nothing happens for a few seconds liek the downloads section. Certain things like the music thingy you got going on because nothing happens when you click it that throws you off a little. The rollovers dont seem to work atall on i.e
A home button might be a good idea aswell.
good job with it though.
Dunno if this helps but this is how it looks in I.E on windows:
click to open full size: