Again, "Your mileage may very."
In my opinion, Yahoo & MSN (inc. Live.com) are far more "domain name keyword" friendly when it comes to ranking. Google, not so much...
Plus (again in my opinion), Y & MSN rankings tend to be more responsive to changes you make to your site -- i.e. As you make changes to the various aspects of your site (Content, tags, etc), you will see movement in your site's ranking reflected sooner on these two SE's than you will on Google.
Remember too, just because you might get good rankings on Y & MSN it doesn't mean you will automatically get good rankings on G.
Since you've already bought the domain you have nothing to loose and everything to gain so go ahead give it a try!
Last note, since you've said that product category is "high tech network gear", one other thing to keep in mind in developing your site is whether your target audience is going to be a bit more sophisticated in their understanding/knowledge of the product category than your typical person. If so, you may find that you have to step up your level of writing in order to engage the visitor.
Good luck!
(Again I've been slow in responding so that this is in response to your post #6 and not the one immediately above.)