I agree with Yerba Mate in the question, why change out what works?
However, if you do decide on the Ranger, I doubt you would be happier. It's a great BC. I've got the Ranger LTD and love diving with it.
I'm not entirely sure I would get the LTD again, though, instead of just the Ranger. The differences are: T
The weight pouches (which are absolutely essential, if you ask me)
The back cusion (which I don't notice, but don't know if I would notice if it wasn't there)
The zippers for additional stuff (in a completely inaccesible place)
The extra D-Rings (some of which are just kindof there, but the one's in the back are my favorite things ever).
The weight pouches are only, like $30, and I read somewhere that you can get Zeagle to sew extra D-Rings anywhere you like (get big ones in the back if this really is an option). And had I really considered this before purchase I probably would have gotten the regular Ranger instead of spending an extra bundle for the upgrades, not all of which are usefull.
Also, 60lbs is alot of lift. Do you use your whole bladder now?