Adire Shiva 12 vs. other subs?

[nosramus]

It will be one sub in a sealed enclosure.

I'm looking at getting one of these subs to join my jbl 600.1:

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12" Adire Shiva MKIV ($125)

specs: http://www.adireaudio.com/diy_audio/drivers/adire/shiva.htm

12" Stryke AV12 MKII ($175)

specs: http://www.stryke.com/AVseries.html

12" Elemental Designs 12Kv.2 (preorder $90)

http://www.edesignaudio.com/miva/merchant2/merchant.mv?Screen=CTGY&Category_Code=KSD

specs: http://www.edesignaudio.com/kv2.htm

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Which would have more SPL and/or more SQ?

Is anyone able to tell from experience or even by specs alone?

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