Contrast/compare 50W tube amps

>>I've heard several 88 amps, bland<<

Perhaps they do not match well with your speakers but, for the most part, KT88 tubes and the amps that are based around them, are not "bland". You need to get outside of the Seas box that apparently constrains your thinking.

I listed minimum impedance for each speaker being used.
I mich prefer the 88s,as opposed to either 34s/6550.The Prima Luna(kt-88) I currently use seems to better the AHT/VIVA set-up previously used.
Any Transcendant "The Beast" owners/builder-DIYers??

I wouldn't think either of the speakers you list would present a difficult load. The only question I have is the minimum impedance measurements. I'm assuming the 9 ohm and 6 ohm specs that you list are nominal impedance specs. The minimum impedance numbers are where any problems usually arise. My speakers are 87db, 6 ohm nominal, 3 ohm minimum, and require power and current to bring them to life. Although a 50wpc KT88 tube amp might sound fine on them, it wouldn't bring out their best performance.

FWIW the M-60 is fine with speakers that are described as above. The amp is not quite *that* load sensitive (as many tend to think it is). Most speakers that have a dip to 4 ohms due to the crossover will work fine. The real issue is efficiency- is 60 watts enough power? But that is moot in this thread.

I have purchased a pair of Transcendant Sound T-8 monoblocks at 80W/CH.I will report my findings as things progress.Much room for modifications.These amps are spec-ing out wonderfully>>.1mv DC offset.I understand that once you find a good workong set of PL-509s,you are in business for a good period of time.