We were able to get a grant to allow our High School Machine Shop purchase a CNC Lathe and a CNC Mill. The Mill uses CAT 40 ER. Is there a certain brand I should be looking at or certain ones I should be staying away from? There is quite a variety of pricing difference in brands. We are just a High School shop and will not be running heavy production. I hope to get good quality durable quality that doesn't break the bank.