ACI Titan II LE vs REL: Opinions

Anyone had a chance to compare the new ACI Titan II LE vs any of the REL Subs?

I spend a great deal of time listening to FM on a second with some small monitors (Swans M1s, Analysis Plus Oval 9 cables, McIntosh MR-71, Musical Fidelity A3CR amp, with Audio Research LS12 preamp) with some CDs here and there. Of course I want to hear that the ACI Titan II LE is a great music sub but appreciate reality better.

Can not easily get to hear either sub where I am at and would like some ideas before committing to a 30 day trial run. Any help much appreciated!:)