A TV tuner is only going to be useful if you wanted Antenna or Cable TV through your computer. It is going to be a waste if you're just going to stream over the net, unless you also want regular TV through your computer. I haven't tried it myself yet but I don't believe media keys (play, pause, stop, next, vol up/down, etc...) work with Netflix so most media center remotes won't be useful either, correct me if I'm wrong.
EDIT: I guess I was wrong, didn't know you could do Netflix over WMC.
I'm assuming the reason you don't want a wireless keyboard and mouse is because of the added bulk? If so, there are a few palm sized wireless keyboards you could consider. I'm using a
for my HTPC, it comes with a small but usable touchpad and the keys are backlit so it's easy to use in the dark. Logitech and Lenovo have similar hand held keyboards.Edited by skkhai - 10/20/11 at 8:34am