The basic theme looks quite nice. But if I think of my favourite computer store's website, I'd say you'd need to have a bunch of good bargains right on the front page. If you think of the visitors, they are people looking for computer parts (I guess that's the kind of e-commerce site you are going for), so you need to captivate them during the very first seconds of their visit or they will quickly leave unimpressed, not bothering to browse any further.

I'd also move the website address right under the "Ballistic Computing". It seems a bit lost on its own.

You need the login text boxes readily available in an easy to find location.