If I were you, I would definitely consider the Shiva even if you are leary of internet businesses. Dan Wiggins, the owner of Adire, is one of the best guys around and his customer service is unparalled. If you would like the security of ordering from a larger company, get the Dayton DVC 12" from
www.partsexpress.com, it is essentially the same woofer.
Now, if you really do have your heart set on the 10" speakers, try the Lambda Acoustics PL series that
www.stryke.com sells. I've mentioned it in other posts. It is without question, the best sub I have ever heard. It is exactly what you seem to be looking for. SQ comes first, but with a 14mm xmax, it can move some air when called upon. You can order it in a variety of VC configurations also. John Janowitz is the owner of Stryke, and although, currently swamped, works his a$$ off to help out us bassers.
If you REALLY don't like ordering from internet sources, The JL10W3s maybe better options for the amp you are getting. The JL10W6 are optimized to run in groups of 3 with either a 4 or 1 ohm load.
There are a number of other good quality subs out there, also.
