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I know the obvious differences but, can anybody tell me what I would be missing ( Tone, Intonation, comfort, fitting into a band) if I decided to go with the 551 instead of the pheonix (I can put Water Catchers, and A main tuining slide trigger on my self.)

More info: I loved the pheonix when I Played it, it was my second favorite euphonium ( B and S 37s took the cake) just I neeed somthing with less of a price tag. Also if anyone knows where i can get any of these horns used in the Indiana Illinois or Ohio area tell me please!

Thanks
Luke!