I have neither but I am going with a microtech LT8 real soon here. Haltechs are just as nice and pretty commonly used. I do believe the E6Ks are DOS based while the E11s are windows based, just FYI. Scott will get you an LT8 installed and running good for $1500. I do know he swapped out 2 E6Ks for LT8s in FDs running a T78 and T66 a like last year, so take that however you want.