7$ for pirated DVD doesn't sound very cheap in my mind, when you can also download HD versions from net & burn yourself, if you want to support pirated movies. I guess normal DVD copies are much more cheaper ? (Less than 1$/pcs ?)
The quality of 1 DVD AVCHD disc can't be perfect, when average movie usually takes > 20GB. I would rather backup my original BR:s using 2 x DVD9 discs with uncompressed & unnecessary sounds ripped, if possible.
The idea of watching HD movies is ruined quite easily, if you have to compromise the quality too much.