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
Agree with most here. ATC dome, also Skaaning (Verity Audio), Eton 5" is damn good, Accuton (Partner/Thiel) concave ceramic dome (in Avalon and LumenWhite) as well, Focal 'W' sandwich drivers are nice and fast, and finally, the ScanSpeaks (new[er] 5" revelator and believe it or not, their [older] 5" paper cone with rubber surround mid is very nice. Relatively cheap too.

Regards,
JBVO - Ha!
oops - forgot one or two.. dynaudio esotar mid dome.., and the seas magnesium cone 4-5".

application is the key... duh

JBVO - out
Atc may make the "best" mid/driver..but can't buy it separately and way too expensive speakers. So now they are ruled out our 2 contenders are Skaaning 4 or 5 inch( 80hz-2500hz) and the Seas W12CY or W15CY (80hz-3500hz). And i wonder just HOW much better the Atc's are than the Skaan's and Seas's????? Heck the Raven 3 offers a 1.5Khz up(best xover at 2K) range and so is a much better driver than the Atc as far as presenting a seamless mid/tweet..and we also need to consider the Philips RSQ8P/11 and ESg3 both deliver a upper midrange of 1.5Khz up(best xover at 2K)
yes you *can* buy it seperatley. and you can buy the speakers as a kit. they aren't as good, but they're still good.
and they're not too expensive, especially when you consider that they come with multiple top-notch amps as well. if you work it all out, they are really quite a bargain.

15k for a three-way speaker, with the best mid-range in the world, a 50 liter enclosure, one of the best crossover networks available, and *six* seperate power amplifiers driving each driver individually. not cheap, but very reasonable.