IMO SGA was the best Stargate series. At least once you get beyound the first (and a half or so) Season. SGA got constantly better, unlike SG1, were the last Season seemed to me like they were forcing to much.
On the other hand I am one of those who absolutely dislike SGU, so maybe you won't like SGA.
I like SGA, and i Also like SGU. No offense to anyone, but i think SGU should've gone on longer (at least one season more), maybe coincide with some more characters (Sheppard, Carter, Mitchell, etc). i would've liked to see a solution for a supply line at the (near) end of the implied season here and maybe a solution of Rush's discovery. i'm surprised it got cancelled, cause i really liked how it had ancient technology, but was older tech, not to mention the completely new characters, and using the communication stones more often.
SGA did get constantly better, and i'm more surprised that it got cancelled than SGU. they should've done a sixth season where they returned to the Pegasus galaxy, and went into an all out battle with all the remaining enemy wraith. (because of complications with Todd and his crew)
another thing they should've included in any one of the previously mentioned seasons of SGA/SGU would be the X-305/BC-305, a new warship designed to be tougher on the Lucian Alliance/Wraith.
Unfortunately, that never happened. there is however an animated third season of SGU going on.
No kidding about the SGA/SGU only fans, i think that's why Universe got cancelled.