SC imba

ive been watching quite allot of sc2 gameplays lately....got nothing better to do. it seems like terrans the main race that can most likely annihilate the 2 other race which are the protoss and zerg, even with the nerf....still imba. ive been watching the vids cuz i want to buy the game but i still need a good computer to use. the computer im using is fairly old.....been using it since high school and its slowing down, even with photoshop the computer seems to slow down specially when i use photoshop while listening to music. now that the new patch 1.1, i think its 1.1, is coming...i heard theyll going to nerf terran in this patch....not sure what else comes with the patch.