yaar the biggest feature that your going to be missing out on either way is ps2 backwards compatability since pirated ps2 discs won't work on PS3's, so just get the cheapest version you can find, 40 GB one should be the cheapest.
Yeah, a new non VR SP IP or a sequel would be best. They can't count to 3 so a sequel doesn't seem likely. Portal is my favourite and would love a sequel but don't expect one. I think I'll take whatever if they bring it on consoles too. Might go for VR as well.