Of SH2 (the best), I have all three versions.
The PS3 HD version is still great (after patch) for those that never played it. Granted, the PS2 Greated Hits version of SH2 is better overall, due to the expansion being included, and being overall a more solid product (no bugs/issues from PS3 HD remaster). This is even after the PS3's patch...though the issues that remain are slight, and unless you've played the original PS2 version, you won't notice.
Now....I also have SH2 on PC. The original big box release (am I the only one that misses the PC big boxes?), and to me that is the definitive release for obvious reasons. Graphics/texture resolutions are higher and loading times are shorter.
But all in all, if you have no other choice, the PS3's HD versions (after patch) is still a great experience. You get not only SH2 (including its expansion), but SH3 as well. There are slight flaws here and there, but like I mentioned, if you haven't played the originals then you are golden and won't even notice anything missing/wrong.
Fiinal word...just get it. Two of the best, arguably the best, in the survival horror genre.