The X3 is the little version of the Hyper 212+ and is a good option if ur case isn't very big.
Now the V8 and V10 are only wasted of money because u can find many benchmarks in which the Hyper 212+ is better that both V8 and V10.
What is ur budget? because depends of the budget exist others very good coolers like the NH-D14, Titan Fenrir, Megahalem or Thermalright Venomous X or Thermaltake Frio.
If u want, u can see here
the best coolers for CPU