This will be interesting.  

My 2 cents is   'depends'.      What do you want it to do?      500  or  10,000  bales a year?     pretty much all  major baler mfgs  offer a   'all out  brute',  and  a more  economical     STO  type  machine.   
.......less money  tied up in a machine,  but  probably a little  harder on resale...  opposed to  one   with  max capacity and  bells/whistles.      
I've said this before,   a  few  thousand bucks  and  your time  will get your old baler 'up to speed'  most of the time,  with new belts,  bearings,  chains,  go through the pickup... and a few odd  sprockets. Most of this can be aftermarket sourced...And  saving  a little off the  JD store..  But that's how i roll.   

Vermeer  is my  choice of  round baler.   They offer  a  'rancher'  series  type baler  that  does  what you need,   I don't know  much about them,  but they sure look similar in design to my old 'j'  baler fleet..   Supposed to  be  a  more economical  level baler.