I thought the internal hdd size limit it 1tb?
Anyway, CFW would be useful, because some movies you rip will have cinavia protection. On 3.55 CFW you can disable it.
Also Showtime Media Player supports more file formats, than the regular PS3 one.
I would also suggest a slim, since they run cooler. I have slim cech-2001a and a slim cech-2501a. The 2500 runs cooler than the 2000.