The images for your products aren't uniform. Try to get them all in similar dimensions, and try to keep the lighting similar. I know you're just getting the photos from somewhere else, but try looking around for some better ones. Scan them from ads in GQ Magazine if you have to.
Also, try and get slightly larger and clearer images. I want to be able to make out some product detail, and definitely I don't want to have to squint at something.
Emp's avatar is already doing enough damage to my eyes.
Nav bar needs to have some Capitalization At The Beginning Of Each New Link to a product section, particularly for brand names.
Speaking of brand names, are these the Real McCoy? If they're not, I'd VERY much recommend you either add the words "look alike" or "just like" next to every brand name, or drop the brand names, and just go for product categories.