I was just looking at dbx Subharmonic Units (the 120A and the 120XP) and with help, I've actually decided against it (them) in fear that I'll blow my speakers (4x10 cab and 1x15 cab). Instead I was referred to the BBE Sonic Maximizer. Simple. But wait, which one?? There are a whole slew of these things! I have a rackspace free and I wanna fill it with one but I don't know which one to get. Musician's Friend sells them new ranging from $99.99 to $249.99. Isn't there a resident BBE guy around here? If so, and you're reading this... help!