Not sure about the low part on the RE MT... I know its a super comp sub... ment to get extreemly loud... but most comps are at higher HZ's... I'm sure the MT wouldn't have a problem though. MT has my vote.
A guy on the forums, at least he used to be on here... its been forever sense I've been on... his name is Isaac. He was using a MT for a daily driver, but he said it needs a huge box to sound really good and low. Other than the sq, which all depends on the listener's taste, would work as a daily driver, sure.
have you thought about the new re xxx, it looks awesome. here is a picture i stole off another thread. the old one is on the left and the new one on the right.