Not totally sure what some of what you said means to me, but hope this helps a little...
I am about to make a choice of a good Digital TV tuner here in the UK again as last one was DOA + was so cheap (50% off random chance to see what it was like) was almost not worth RMAing so resorted to anime instead LOL
One thing I did learn from a Lot of research back then was choose damn carefully, almost Every single one had some kind of defects in operation!!! until you hit the $140 mark.
Problems were things like:
Very poor reception even plugged into a main house aerial (very common)
Slow menu systems
minor static / unclear image even with great reception
TV guides did not work right
were older tech rather low resolution picture
Is worth trying to get a dual channel one so you can record and watch at the same time maybe, if they come dual channel for your budget...
I think that there are many more and cheaper choices now than when I looked 1.5 years ago, so hopefully you will find a good one within your budget.
If no one here comes up with a recommendation, best thing to do is look for a few web reviews of each one you are thinking of buying and see what the general consensus is on it...
Good luck