I dont claim to be an expert like some, but I have fished 2 out of the 3, and owned a Kistler, this is just my opinion.
the Cumara, felt bulky and tip heavy to me comapred to the same exact rod in a Rainshadow RX8+ blank.
the Avid, I liked it alot, fished it in the AVS68MXF,( a friend has 1) very responsive, light and plenty of backbone to rip the hook through heavy plactics and get the job done.
I owned a Kistler He69MHC, liked it but I dont miss it, for a MHF rod it almost felt pole like to me and found my self ripping lips more then setting hooks, maybe Im just use to the XF tips, I dont know.
The choice for me is easy, I'll take the Avid, but I wont trade my Mossybacks for one.
Good Luck...keep en eye open for a G Loomis in our classifieds and other forums, they can be had reasonable, I just picked up a Mossyback BSR852 super cheap and it was handled once.