I've read good things about the Barska scopes and have noticed that a lot of shooters here use them. I was actually advised to stay away from the Tascos, though. I guess they're pretty cheaply made. At least that's what I've read/heard. No personal experience with them myself though, so don't take my word as law. I'm a newbie to this yet, also.
When I first started doing research on my Kitty and what to replace the included scope with, Leapers was a name that came up a lot. As such things go I can't really tell you which would be better for you. I just don't have the experience. All I can say is that I like the Leapers scope better than the Gamo scope and the Daisy PowerLine 3-9x32 that I bought earlier. I was looking at different Leapers models for a while and I'll admit that I got the one I'm using now not only because of the name, better measurements and optics, but also because I was looking for one with a sun shade. I just dig the looks. He he he
I ended up getting a Gamo One-Piece Mount because of my experience with massive scope creep with the rings that came with the Daisy Powerline. I want my scope to be as rock solid as possible and since the Gamo One-Piece not only locks down at 4 different points, but also has the scope-stop pin built into it, I knew I just had to have it.
I originally was using the Daisy rings and the bottom of the rear ring that came with the BC's original scope as a scope-stop since it already had the pin in it and the daisy rings didn't. But, I knew when I did it that it would only be temporary. It was an ugly solution and I'm going for a more s3xy look.
I'm much happier with the overall look and feel of the Leapers and the One-Piece unit. I'll post pics this weekend if you'd like.
Just remember, as with all things, your mileage may vary.

LJ