I don't know much about the video side of things, but I am really into the audio side.
For speakers, I would stay away from internet brands, I have heard some of them, and have been mightily disappointed (not going to name names).
Totems will appeal to the WAF crowd, they provide big sound from small speakers, kind of follows the Bose philosophy, but provides much better sound quality.
B&O also works along the WAF factor, more expensive, but blends nicely with many high end home decor. Not everyone is into big box speakers.
Magnepans, the planar speakers truly sound fantastic. But they need periodic servicing, and I'm not sure it's a good idea to sell these speakers alongside ultra expensive box speakers.
NHT, have always loved this brand. Their new home theater line is modular, very flexible in the upgrade department.
Cantons, heard very good things about this brand, but expensive, not sure enough people will want to spend the money for them.
Canadian companies usually make very good speakers for not much money. Paradigms, PSB, Energy (and of course Totem) come to mind.
For electronics, Shangling (did I spell it correctly) seem to have good reps with CD players. High end Yamaha, Denon, Pioneer elite receivers for the hometheater guys. Bryston, Mcintosh for the 2 channel crowd.