Not sure I agree about the Belkin router - I have one which I'm now using wirelessly. It takes a short while to settle down when I first switch on but then seems to run faultlessly. have you checked the utility to see where the break occurs - could be a problem with the receiver, esp. if the wired part is working correctly.
SO far as the downloads are concerned, have you trie working with a downloader - this will allow you to stop and restart most downloads. I use
which I beleive you can still use for free if you don't want updates, and there are some good freeware ones as well.