I think I recommended the Ambassador in another thread recently. Many parts available , either at TheBandroom or cheap horns to cannabalize. Built very well and have a good sound, easy to play. I use to have a Reynolds Emporer cornet, aslo a quality instrument and have a Roth cornet that is a fine instrument, I believe. Reynolds parts are harder to find, I think. I read where the Medalist was a down grade from their earlier horns I have mentioned. If you can find a good Roth or Emporer, or others of that era I think you would be better off than having a Medalist. Probably others will opine. OLDLOU has a number of Reynolds and Olds horns.
I have never played a medalist model, so can't say how they compare in that way by personal experience.

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Dave Rafferty
07 Barrington Trumpet, 1972 Reynolds Medalist
55 Besson 8-10 trumpet
55 Roth by Reynolds Cornet
73 Olds Ambassador Cornet
30's Czech small bore Trumpet
Getzen 80 cornet, 33 American Standard cornet
66 Olds Ambassador Trumpet
www.kalamazooconcertband.org