My 15" early 2011 MBP only has one Thunderbolt port, and I need two. One for my UA Apollo Twin soundcard, and one for my Apple cinema display. Right now I've connected the display via StarTech USB-to-Thunderbolt adaptor. This creates a noticeable lag, i.e. mouse moves "slow" and other noticeable latency. If I could, I'd buy a newer MBP with two Thunderbolt ports but for now, that's not financially realistic. Could there possibly another solution I'm not thinking of?