What's the best mid-range driver available?


I'm thinking of trying the DIY route for a pair of full-range speakers. In your opinion, what is the BEST mid-range driver available and the best place to buy it?
Thanks for all your comments for the tweeter!
Thanks and happy listening!
myraj
LAZ which ATC speakers do you have ..the SCM 50's 100's or the 150's. The ATC active speaker may..no IS the best commercial speaker in the world. No doubt in my mind. However you did mention like 15K. That leaves me out. However i'm trying to find out if my designer will work the ATC 3 inch soft dome into the SEas W22 + RT8P. Hope they are not more than say $500 each..i may go $700..thats tops. If they are more than that I'm going with the big philips ribbons $850/pr
i use the 50's. i know of one distributer that sells the midrange driver without the magnet, but i'm not sure about the 3 inch. let me do some research, and i'll post again shortly.
One more contender for "best" mid. Accuton 2 and 3 inch dome, probably 2nd to the ATC
so they make the best mid, but do they do as well with the woofer and tweet or do they have someone else. Now i would have doubts that they can do all 3 drivers world class. If the thread said best tweets, then which would show up? Lets not bring up the Accuton Diamond tweeter at $2800 EACH!!!. I guess top tweet may be the Raven 3
ATC will not sell any drivers alone. There are only 2 distributors in the country and I know both. If you want to buy and demo pair, I can turn you on to the importer and distributor of ATC located here in Denver. Cheers.