[Geof]

..... Can someone point me in a good direction for entry to mid level Cat 50 tool holders....

You are not buying an "entry to mid level machine" why are you cheaping out on the tool holders?

Your spindle will be much happier, now and in ten years time, if the only tool holders you have used in it are top quality. Remember if you use an inadequate holder which causes fretting damage in the spindle taper, and chatter with poor surface finish, the fretting remains when you throw away the cheap holder. Now even the best holder cannot perform up to its standard because it is in a damaged spindle taper.