stats

lynno,

     Just a clarification:  Martin Logan and Sound Lab are electrostatics, Apogees are planar type speakers similar to Magnepans.  
     Sorry, how they compare I'll leave to those with more experience than I have with the 3 brands.

I think the only person to make that decision is you.
All three are respected companies. All three have different sound qualities. Time for you to do some auditions...
Bob

I've heard them all and at one time or another loved or didn't like them all...The Electrostatics and  ribbons both have a very different presentation than a traditional driver speaker.  Plus they can be very room dependant. You really need to experience it yourself. It can be hard to get around, I'd recommend trying to make an easy show like axpona or Rocky Mountain.
Good Luck, Tim

I have heard all of them. IMO Sound lab is the best of them. The Martin Logans always seem bright sounding to me. The Apogees are no longer made, may require expensive service, and some models like Scintilla require very careful amp matching.

If you are thinking of full size speaker models with any of these you really need a big room to get the best from them.