I too love my sci fi shows!
My partner & I ended up so addicted to new BSG (Battlestar Galactica) due to the 'doco style' camera angles and the realism of events and weaponary. Not to mention trying to get your head around the 'new' cylons!
Might have a look at this Earth2 as I seem to have missed this one, and always in need so some new sci fi escapism, as have seen all SG1 and Star Treks.
Cheers
Grant