GTA: SA or NWN: D?

I've got $20, and i've really been wanting to get GTA: SA for PC lately. I don't have any other platforms that GTA: SA is on besides PC. But then I saw the NeverWinter Nights: Diamon is also $20 on Walmart's website. I want to order one of them, but I can't choose. I wanted NWN at one point, then I moved on to other games and then GTA: SA. I already have GTA: LCS for PSP and have done most of the stuff in it. Would it be worth it to get SA or just get NWN since I already have a GTA game?

I'm torn, and my brother will order it if I pay him back. So, as soon as I decide I can order it, and get my game sooner. So, Grand Theft Auto: San Andreas even though I have GTA: LCS for PSP, or NeverWinter Nights: Diamond instead since I already have a GTA game..?

True, but NeverWinder Nights: Diamond is the original NWN game, plus all 3 expansions. I just can't choose... I love action games and just driving around and doing nothing in games like GTA, but I love RPGs and fighting and dungeon crawling and making builds and junk like in NWN. It is just sohard to choose! NWN also has online servers and stuff... But I want to fly planes and do stunts and stuff in GTA... =[ THIS IS SO HARD! My brother will be back in a bit, and he said he'll order the game then. I just can't choose.

A fun RPG with 3 expansions and online... Or a huge sandbox action-adventure game with open-ended gameplay and HOURS and HOOOUUURSSS of extra things to do, not including the main story line... I just can't choose...