We just sold a used Roland kit. Their heads are amazing. Sounds are subjective. The Alesis Module has been out for many many years and a staple. But very simple. No efx (unless you select a drum set with them) The heads are 8" real drum heads but they lay on the controllers. If you don't mind simplicity and reading the manual you will be happy with the Alesis.
For the money the Yamaha Explorer kit would be a better bet IMHO. Great sounds,flexibility. $699. I would buy an extra three zone pad to add to it though (about $90) for the snare and use the second output on the kick for the extra pad.
Its much better for the same money as the Alesis.We sell both and I would choose the Yamaha for a beginner. It has a nice training mode with various rhythms and music you can play to with or without the drums.
_________________________
Yamaha Tyros 4
Yamaha Motif XS8
Roland RD700
Casio PX-330
Martin DC Aura
Breedlove ATlas Solo
Bose MOD II PA