I own a Revel Sub30 and have been able to achieve a staggering level depth and detail in the bottom octaves. The balance between sheer power and finesse is truly uncanny. The built-in 3 band EQ and additional controls certainly help to dial things in. I've also been able to integrate the sub30 more seamlessly than any other sub i've owned before. I've never owned or listened to REL, so I can't comment other than some models in their line-up do come highly recommended. You owe it to yourself to add Revel to your shortlist of potential subs. Also if the 30 is a bit too pricey, the B15a is also terrific and has many of the qualities of the 30. Best wishes!!