The ones recorded with Stan kenton's Orchestra and also the 'Five Saxes'(Dave Pell, Bud Shank, Bob Cooper etc.) are well worth getting too !
So far on my 'de-dusting' of the Mosaic set the sound quality is much more than OK, although I've not got the 'Five Trombones' session yet.
Some great Milt Bernhart solos on these sessions.