hmm... 180mm mak. it does have more aperture.. whats stopping you from do ing the dob now tho?... i mean i know the 12" isnt very portable but how about a 8" or 10"? it'll probably cost less than the mak or ed100 and have more aperture... the money left over can go into eyepieces
but if you are stuck on teh ed100 or mak i havent used either but the mak does have more aperture. what sort of mount do they come with?