I want to buy a HT speaker system and a receiver. It will be used for movies (65%) and music (35%). Budget for speakers and receiver is roughly $2,000.
. . .
1. Should I go with 7.1 or 5.1 will be enough for the room size I have?
That's up to you. IMO, 5.1 will work just fine in that room. (I run 5.1 in my ~15' x ~30' room, with the surrounds on half-walls ~18' back, and my chairs at ~15' back.)
2. What are the best options and models for speakers and receiver?
Wow, that's a wide-open question! A few thoughts:
- Good mainstream receiver brands include Denon, Marantz, Onkyo, Yamaha and Pioneer.
- Audyssey MultEQ room-equalization software is, IMO, the best of the bunch. Denon, Marantz and Onkyo use Audyssey; Yamaha has their own YPAO and Pioneer has their own MCACC.
- Of the flavours of Audyssey, MultEQ is good; MultEQ XT is better and MultEQ XT32 is the best. Get an AVR with at least MultEQ.
- Regarding features (# of HDMI inputs, processing options, networking, etc.), it's up to you to decide what you want / need.
- Good mainstream speaker brands include Polk, Energy and Paradigm. I advocate shopping for gently-used speakers - you can get great gear for a lot less than new (if you're patient).
- For subwoofers, companies like SVS, HSU, PSA and Rythmik (among others) offer excellent performance for the money.
Here's a guide.
3. How should I place the speakers, specially the surrounds and the subwoofer?
5. For the surround speakers is it better to go with direct or bi-pole/di-pole type? (I know nothing about bi-pole/di-pole speakers)
Generally-speaking, you should use direct-firing speakers (such as bookshelf speakers) as rear surrounds, and if you're running 7.1 you can use bi-/di-pole speakers as side surrounds.
Hope this helps.