Spincasts are cheaper, but retrievers are very simple, easy to use, and last a long time. Any old bow will work, no need for a brand new one, but the two you mentioned are good. I shoot an old $25 recurve that I don't mind getting muddy, bloody, and slimed. I also have an old compound set up as a backup bow. If you decide to go with an old used bow, don't shoot over 50#. 40# is plenty and won't wear you out.