Dear friend, I am not an expert is setting website like you have done Yours. So i cannot comment much on the design and set up etc except that its looks excellent.
But would like to comment as a customer or your prospect scanning though your website. I would like each and every click from any website to open in a fresh window and not the same window.
If i do not find the link to your window interesting, i would normally shutdown that window using X in the extreme right and this will close your ws. window too.
There are chances where the prospect may feel little lazy again typing your link or opening up the mail to hunt for the link. On the other hand if your site is still open , he/ she or rather I

will continue ahead with your website.
Well i am new here, Hope i am able to convey what i wanted to.
Cheers
Burgese.
PS: One more thing which came to my mind is. Its a must now a days to have a link for Bookmarking the site, especially when majority sites are advertised on Traffic Exchanges for 7 to 20 second timer. Here the Bookmarks will be very helpfull.