Personally I thought Tru Calling went downhill rather fast when Jack was introduced.It only really gets interesting when they introduce Jack as an antagonist.
I own both seasons of Dollhouse on DVD, but it's been a while since I've watched them. Now, re-watching the show, I remember why I bought them. I think the show is excellent. I really recommend watching it all. But it might take a while until the show really gets going. I don't know how much you've seen.I've watched all of tru calling and haven't watched much of Dollhouse,so im in a pretty similar boat