We use a kuhn accumulator and bale grabber. It's the 10 bale with the end bales turned. It made things easier but it certainly took some getting used to. Make sure you have access to Machine friendly storage or help to unload the hay. Stacking squarely (pardon the pun) is critical to getting the hay to trailer and be able to regrab the hay.
I make lots of sm. square bales and we've run NH balers since the 1975 and the 575 models since 2006. The NH 575 is a good solid dependable baler that eats hay. Hesston makes a good baler along with JD. I guess it depends on what you have close by for a dealer. Only draw back I have with the Hesston inline is if you run older smaller tractors and make big swaths, sometimes it can catch up under the hitch. So one has to watch for that issue depending on tractor. I use a NH bale wagon to pick the bales though so have no info to share on accumulators.
Hay is delivered by the stack with stack retriever truck.