Few Type R Questions

[regal8r 5,000+ posts]

I am planning on getting a single 12" Alpine Type R sub, but have a few questions before I buy.
1) Should I get DVC 2 Ohms or DVC 4 Ohms? What is the difference? They are the same price btw.

2) What would be the best way to wire this subwoofer to get good SQ and SPL?

3) What amp under $200 would give me the best sound for the money?

Also, why does the Type R get so much hate on these forums?

dual 2 ohm type r, hifonics bx1205d or bx1500d