I want to build some decent home theater speakers. Where to start?

I’m not an audiophile, but I want to build some decent 5.1 or 6.1 speakers. Can someone point me to a resource?
I picked up “Loudspeaker Design Cookbook” by Vance Dickason, but it is way, way too advanced. I’m a noob, so I need something that speaks to me at the noob level.

I am looking at an inexpensive but decent home theatre system. How about Yamaha NS-SP1800?

Does anyone have one and what is your opinion? Any other suggestions for easy setup, about $100-$300, and with decent quality?

What are the best wireless headphones on the market that would go great with a decent home theatre system?

If you could,… please be precise and provide a link if possible.
I’m looking for a top of the line set of wireless headphones (price doesn’t matter) with the least amount of interference. All the ones I’ve had get “hiss” and “crackling” in them and a few have actually had telephone conversations heard on them.
Thanks