well unfortunatly it seems a combo of equipment will give you best results.
for 4:2:0 SD imo the fortec mercury II is amazing, good price point and damn great ird, finds almost everything (once in awhile it misses something, but not much) and has excellent motor controls.
many feeds (esp sports) are 4:2:2 and more and more are also HD. the QualiTV is a good choice for the most video encoding types, it covers damn near everything up there. but it doesnt have blindscan, so using it with an ird like the fortec is a good idea still.
I use my pc with a genpix usb sat tuner to get all the 4:2:2 and HD stuff, its a little cheaper, and more fun imo, but its not really as nice for just sitting down and watching tv, ie no remote.
defn cband and ku if you can, that doubles what you can watch.