Depends on your budget, the pruse mk3new one is amazing and has many features that stop failures. But this is £699 for the kit.
My experience with the wanhao i3 is that there needs to be some upgrades in order to get it to print great, like a better titan hotend etc.
I run a prusa i2 homemade, wanhao 4s and now a Moai the 4s is good, but again, i need to upgrade the dual extruders for great prints and great prints in Nylon. stock extruder works ok with nylons.