what drivers are best? thinking of a DIY project

http://www.6moons.com/audioreviews/zigmahornet/zigmahornet.html

http://www.diyaudio.com/forums/full-range/139493-zigmahornet-family-project-if-you-cant-beatem-joinem.html

http://www.enjoythemusic.com/diy/1109/merrill_dca_4.htm

The second link should have plans. These are loved by all because they are so easy. The Jordan driver used by 47 labs is just a modded jx series driver. The 92s is new but should all be the same. Not cheap though.

If I were building these as a beginner, I might be inclined to start with cheap 4" drivers from Fostex or similar. Once you are blown away by that quality, then upgrade drivers.

I'll try to upload my office system today or tomorrow so you can see what I'm playing with...

I use my Merrill Zigmahornets daily and can't believe how good they are. You can get the instructions on-line to build the 1/4 wave transmission line cabinets. My only mods were to use better wiring, real binding posts and spiked feet.

The bass from these is tremendous due to the cabinet design. I run them with a 10 watt tube amp and never run out of power. Guessing at 94-94db efficiency. They are very smooth and not "shouty" at all like some mentioned above. The Lowthers have that bump around 1000hz which is very noticable in my opinion.

Since the Merrill drivers are no longer available, my preference would probably be the Jordan 4". The closest I have seen to these in a production model is the Role Audio to give you an idea of what you will get.

Theres always great posts on madisounds site. Im a firm believer that smaller is better. Id rather sacrifice some bass to get seamless mids to highs. Also, the jordans i suggested are used in the 47 labs speakers.

Phil,
I just uploaded my system "My Desktop System". Should show in forum threads.
I did have these in my living room which is 15 x 25 and they did great. Imaging was beyond expectations. I was only using 10 watts so it wasn't earth shattering. 30 watts would have done the job.
If you are worried about filling the room you could consider adding a sub? I did try supertweeters but these are so efficient that it was hard to pick up on the gains. Come to Pittsburgh and listen for yourself?