Well I guess I got it wrong before about the Samsung 451 having both, D* and QAM tuners. That kinda sucks but I guess it makes sense. D* doesn't want people to be able to get digital cable with their own equipment.
Anyway, yes I have the CM 4228. Not sure about the amp, though. The antenna and 2 D* dishes are mounted on my roof on one end of the house, with the coax running the length of my house through the attic to the other end to a back closet where all of the AV stuff is. Since the amp needs electricity, I'm assuming it will be located somewhere inside, out of the weather. This weekend I'll have to locate it to see if it is any good. Surely it's somewhere between the two ends in the attic. You can't have an antenna without an amp, can you?
Unfortunately I think I'm out of luck after looking at the antennaweb site. My 4228 is currently facing about 5 o'clock and I'm getting 29-1 and 5.1 without pixelation, although I had to tweak it a little a few months ago after 29-1 just disappeared on me out of nowhere. After messing with it I discovered that the wind had repositioned it just a bit. A small adjustment in the way it's pointed makes a big difference. The problem is that KNWA is between 2 and 3 o'clock which is, unfortunately, almost directly to the side of the antenna. So - I think I'm out of luck. I can't imagine that the best amp could help the 4228 pick up a signal that is broadcasting directly to its side profile. Maybe getting KNWA through Cox via the 451 is my only option for my extra room where I need the new tuner, which means I won't have D* in that room.
Maybe I can get KFTA when it goes OTA since it's more in line with KHOG and KFSM. Thanks for the input.