FWIW, I have a quad of pre-rola greenback 25's and I dont care for their tone. Everytime I bring out the cab, everybody loves it... even the HOM guys

. I prefer the early rola greenbacks (1972+) since they are a little bit brighter. I think the blackback 25's are okay too, but they are more bright than the early rola's....and are great for metal. With that said, my favorite speakers seem to be blackback 30's w/ 55 hz. Recently, my ears have not been liking the late 70's-early 80's 65's. It may be because I have a quad of EVM12L's loaded into a late 70's Marshall cab that sounds heavy...pun intended.