Store sound v/s Home sound

" One of the constant problems is when the speaker were brought home they didn't sound the same."

Different room, different electronics and they need to break in. Also, your emotional state is completely different when shopping for gear. You may be worrying about making the righ choice, excited, good mood, bad mood, and any number of issues similar to this. And when you're worried about all of these other factors, you get distracted and miss things. Your home is a completely different environment. When you're more relaxed and in familiar surroundings, you'll perceive your system in a different manner than you did in the store. 

" I made a purchase with the amplifier, processor and speakers demonstrated together, once home the system didn't sound the same.  The store was always better.  "

HT gear comes with all types of signal processing/room correction. The dealer may have set the system up completely different than you.

***If you buy a new pair of speakers from a high end store (not BestBuy or similar) and they don't deliver and set them up for you, find a new dealer. 

"And buy 'Get Better Sound'. "

That's a decent book, but try reading this publication first.

http://vandersteen.com/audio-perfectionist-journal

There's 16 issues you can download, and they're all free. Its just my opinion, but I think APJ is the best reference I've seen on high end audio, by far. Its a must read, especially if you are a beginner. 

With regards to this discussion, there's a lot of great info on room tuning. They even teach you how to make DIY tuning panels that are as good as ones that cost a lot of money.