Soundlab speakers...how reliable?

I own M2's that have not had any issues and live in New Jersey which gets pretty humid in the summer.
I drive them with audiovalve challenger 180 monoblocks and they perform extremely well;ralph's amps are on my radar in the future.
I installed the impedance mods and they already had the copper diffusion ring with the tordial transformers upgrades.

In January Soundlab introduced a new backpanel which not only made the speaker a lot easier to drive but also has it sounding better, regardless of the amplifier used.

I've owned Soundlabs for over 10 years in midwestern humidity with no problems. I recently upgraded to PX panels, the new (consummate) backplates, with the hot rod upgrade. If they were problematic, I would never have stayed with the brand.
If you're buying used, & are concerned with membrane reliability, it should be noted that new membranes can be factory applied to the panels at a fairly reasonable cost.
Rather than the M2's or M3's, I would recommend considering the full-size M1's. My room is approx. 13.5 wide with a 7.3 high ceiling & the M1's & M1PX's have worked quite nicely.

Awesome speakers and the best I have owned to date!

A thread was started on the Soundlab Owners forum to correlate with this one. Concurrent and additioinal information can be found at: http://www.soundlabowners.com/cgi-bin/yabb2/YaBB.pl?num=1378173964/0#3.