Good choice John , I use the supplied 20mm's and a cheep pair of Bintel 40mm plossls that work great in my WO binoviewers , its hard to go back to cyclops viewing once you have experienced using binoviewers .
The RKE's sound like the go , but be happy with what WO's come with , these work well even with the supplied barlow .
I dont need that when using my Tak M210 it reaches focus without it , and the moon is scaryly good using 2 eyes in this scope .
Brian.