Looking for MM840 insights

[IrishChamp]

I'm missing my SR124DVC something horrible and after my two Sundown e8 in a ported box just went up in smoke I'm trying to replace them with something that is more on par with the sr124. I'm very tight on space, I have about 1.4 cu.ft gross and about 4.5 to 5 inches of depth (inside clearance) to work with. I was thinking 4 MM840's powered by a PAD10001 but I've not really been able to find any insights. any time they are mentioned its in a favorable light but that's about it. do the mm subs need much room behind the magnets, I would only have .5 or so clearance, adequate for cooling?
how do they perform down low? do they have nice detail and accuracy? can I get something that will resemble the sr124 unitizing multiple mm840's?
I was thinking that 4 mm840's would be very nifty, what's the consensus here?
Other subs I'm considering are: JBL GTO804's, Image Dynamics id8v3's and Sundown e8v2's or maybe sa-8's (just two of them) but they really NEED to be Ported.
thanks

PS. if I loose about 1 inch of leg room I MIGHT be able to fit a couple mm1040's, MAYBE. I'd only go this route if the 840's don't seem like they will perform.

[IrishChamp]

Bump it up for Friday evening at home with the new baby. :)

[IrishChamp]

Morning bump.

[IrishChamp]

Just realized thIs is not the car audio forum, could a moderator please delete this thread?
Thanks

[acicadrearo]

looking clean so far looks like it would get low