You're a 1000% better off, and as you've discovered it's very easy. IMO don't run the vCore above 1.35v and 1.40v MAX, and whatever lowest value is stable is BEST. Run Prime 95 overnight and monitor your temps. In many cases, to a point, the vCore doesn't need to be touched it all depends on the target OC.
Also, I would set your Corsair Vengance DDR3-1600 manually: Frequency, CAS incl Command Rate, & Voltage.
Good info -> http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/3