Alright so I have g51 5.1 surround sound hooked up to my 7.1 built in chipset on my EVGA 780i motherboard. I'm thinking about getting a sound card but I dont know which to go for since my surround sound is 5.1 should I get a 5.1 sound card or a 7.1? Will the 7.1 be have better sound quality, im thinking no since I dont have 7.1 but I need help.