Hi there guys! Just want to get your expert opinion.. I own an Asus GTX 550 Ti Cu and I just want to know which is better between GTX 560 and 550 ti SLI. I dont have the budget right now for a high end GPU so I'm just planning to get a 560 and sell my 550 or just buy another 550 and SLI it? Hope you guys could help me decide thanks!