Of those receivers, I'd probably go with the Onkyo or Denon. That Yammie is supposed to be good, but I don't think it is at the same level as the 801 or 3805. I beileve the Yammie 2500 can be had for ~$500 also, so you might look into that. I'm not familiar with the Wharfedales; I've only heard the Evolution bookshelf model and I thought they were pretty good. Either of those subs would be a great choice, except that room is might be needing a more potent sub, like a 25-31 Plus.