If you can catch a Brit series called "Ultraviolet" do so. It is one of the best Sci Fi offerings in the last 10 years (IMHO).
Being a Trekkie of many years standing, I have admit that I enjoy both Original & Next Gen, though I've never been able to really get into the other ST series.
Love Stargate & Bab.5 and also enjoyed Andromeda when I saw it here.
Unfortunatley, I don't have cable, and in Australia that's where all the best SF is on TV.
I've heard of the new Battlestar - and am shuddering.