According to the Gigabyte specifications for your motherboard it is not SATA 3 6Gb/s capable. You are limited to SATA 2 3Gb/s performance levels. However, SATA 3 6GB/s ssd's are backward compatible with SATA 2 3Gb/s but there will be a performance reduction. A SATA 3 6Gb/s ssd will be reduced down to SATA 2 3Gb/s levels.
If you decide to purchase a SATA 2 3Gb/s ssd, then I recommend the Samsung 470 series ssd's. The 470 series has an excellent track record. They are reliable and relatively trouble free:
Every time you purchase new hardware something new and improved becomes available. That's just the way things are.
Personally I decided to skip SandyBridge and Z68 upgrades. I am holding out for the next generation which will incorporate the new PCI-e 3.0 standard. It looks like ssd and video card manufacturers will be migrating to the PCI-e 3.0 standard.