for the pros, opinion on these subs

yea i want an honest opinion on jus these subs.

which one is better in a sealed box. im lookin to put three in one car.]

the main need is SPL but i need a bit of SQ cus i don't want nasty base.

Digital designs 9100 12 inch

Resonant Engineering MT 12 inch or XXX 12 inch

IMage Dynamics IDMAX

or anything else

and cud anyone recommened any cheap but good amps

thanks alot peops

If you go RE, go with the XXX, it has Adire's distortion reducing XBL2 technology.  The MT does not. 

Of those three subs I would pick the XXX over the ID... but I haven't heard the DD, so can't say anything about that. 

3 of these and the requisite amplifier power is a relatively substantial investment.  Are you planning to compete?

The next thing I would do is model their response curves up and see which, if any, is noticably more desirable than the others in the space you are willing to dedicate to the box. 

yea, nice one geez but i was just thinkin cause the MT is costing me the same as the XXX. so wat do u think?

nice one