Sounds like a simple 10" or 12" miter saw will work fine for you. I have used a simple 10" miter saw for years with no regret. I also recently bought two Dewalt 10" miter saws off Craigslist. both for $100.00 or less. Both like new. There are a lot of people who buy them and dont use them or bought for a project band selling when done.
Here is an example... A good saw
Delta 1" Power Miter Saw - tools - by owner - sale
Most any saw in like new condition will get the job done. you can cut like a pro if you just take a few minutes to do a FULL adjustment on the saw before you use it. One of my saws the guy was happy to get rid of it. Always left a gap because it wouldnt cut square. This saw was as NEW. just needed to be set up correctly.