good rpg with graphics = Neverwinter Nights, and you can now get the expansion, i loved the game.
Dungeon Siege was ok graphics, but the game was to easy i mastered it like nothing.
Diablo2 is greatly addictive, however graphics are bad, sometimes i wonder if gta2 graphics are better
Now it depends what kind of rpg you really want like those are i guess a certain class, there are other rpgs like black and white with decent graphics (i have an evil profile for outlet of anger nothing like throwing a villager then nailing him with a fireball, and a good profile for those mellow days...)
Now there is also a game called sacrifice very addictive and fun, older but good graphics i still enjoy it on occasion i suggest giving that a shot.
Gothic is an older game and full of dust on my shelf havent played it in a while, well it had ok graphics back then and i realyl cant remember thats a pretty deep RPG, gotta pick a camp (team basically and get accepted not as easy as it sounds)
Pool of Radience, i think i spelt it wrong sorry, however i have never played it although my friend owns it and played it for a while, i cant recall how great the graphics were but i believe thy were decent. Its a turn based sorta game.
Summoner was a pretty good game i used to love it, altho the turn based attack got annoying, but some of those chain attacks i pulled were intense. Its a game worth looking into, hmm i wonder if there is a summoner2 i cant remeber...i should look it up.
Also look out for Lineage II: The Chaotic Chronicle i hear it will be great , i probably wont get it cuz its strickly online and you have to pay for online play..BULL****!...
I hope this helps, if you need anymore dont be afraid to ask I m usually around...hehe
~Zoltan