Best sub for VA Mahlers


I'm building a HT.
I have Vienna Acoustics Mahlers, Oratorio & 4 Waltz's for 7.1.
I need the .1.
The room is not enclosed which results in nearly 8400 cubic feet. Immediate listening area is 3400cu.ft.
I am considering REL Stentor, VeloHGS18, AerialSW12, Revel and (get ready) SVS B4+.
Can anyone recommend the best match?
Budget for sub is $5k.
Thanks!
cajunlab
I demo'd the Mahlers with a REL Storm III, but the Mahlers did not need the sub. When the dealer turned off the REL, the speakers still had plenty of low bass and sounded fantastic. If you need a sub for HT, get a pair of Storm III's.
I agree with Sugarbrie,

You are going to need to go with a Stentor to get more solid bass than you are currently getting.

KF
I've heard that ONLY a Stentor (or 2) will improve on the Mahler's bass. That says a lot about the Mahlers' bass.