Trust me, I can usually tell the difference between an analog and a digital in SOME planes, others, not at all or not enough to ever worry about. These days I buy nothing but digital but I don't waste them on just any old plane. I also get picky where the better servos are going, I always use the best servos on the elevators and rudder with the cheaper servos going on the ailerons. I use analog on my throttles but they are pretty good bearing servos. On an old SPA 60 size pattern plane what I use just depends but because I use the heck out of the rudder there will be a pretty good servo there. I have no strong or hard rules on servos until I get to about 1/4 scale planes, even then it depends on the plane. My kingdom for a big box of high end servos but I use what I have or can afford. With bigger and better coming out every day I can't keep up with the market. I don't even know what is new out there, I don't have anything big or new in the works but when I do I will be looking at the new stuff and looking for the big deal!!