I just got a parker buck buster at cabelas. I was looking at some Hortons, but the parker came highly recommended by the crossbow guy, who really seemed to know his grits.
I like it. It shoots well, the only problem I have with the funciton is that the safety let-off is LOUD. You can let it off using a lot of control and make it go quiet, but if you just let it drop... loud.
It has the three red dot on it. Very clear dots, adustable brightness. Right now I just set the lowest dot to 50 yards... but that will get further in a couple days once I get used to it a little more. Though it doesn't take much getting used to, I'll put my first group below.
The trigger let off is clean, cocking is very smooth.
This was my first four shot group at 50 yards. The one away from the group - definitely shooter error. Cabelas chapstick for size reference

Yeah.. I just helped pay for their christmas party.

Notice how the bolts are facing different directions... the crossbow had enough power to make the target jump, at 50 yards!