Cereus ???

This Cactus is 4 years old, and is in its first 'Bloom'. I believe it is a member of the 'Cereus' Family, Comments and help identifying would be appreciated.

 

Looks like an Echinopsis sp. to me... (Cereus species have usually columnar habit!)

 

Lila, Thanks so much for your time and response! The cactus 'bloomed' two nights ago with beautiful white flowers! I will post some more pictures soon...It does certainly resemble an 'Echinopsis' Cactus.