Baldur's gate 2 was the best of these types of games, since then they've got a lot better graphicly but have lost alot gameplay wise, just not as tactical or as fun.
I suppose if you fancy a similar experiance and have access to an old xbox (might be able to play on a 360 or PC) then the first Knights of the old republic game was great and had a similar-ish playstyle.
I assume you've tried them but if not Mass effect and dragonage are very good new style RPG's from the same company as BG, and oblivion is also worth trying just for the size and ammount of stuff that you can do.