For miter saws, decide what you'll do with it. 10" models tend to be more accurate than 12" models. 10" is good for trim work, crown, etc. If you're into framing, deckbuilding, etc... some 12" saws can slide nearly 13" but those big blades deflect during the cut more easily. Also takes more power to spin a 12" blade.
For table saws... yeah, go big or go home. New saws, "Pro-am" or serious hobbyist level saws start around $700-800, minimum! Jet, Grizzly, Shop Fox are good brands. All Chinese. Powermatic is good new USA stuff. Over $1500. Same with SawStop. Used, you want a cast iron top and a belt drive motor. Craftsman saws with models starting 113.xxxxx are made by Emerson in the USA. 10-50 years old, though.
Personally, I would buy a new miter saw as they are easier to knock out of square, especially sliders. I'd be ok buying a used table saw. Table saws are a lot easier to true up than a miter saw.
Spend $60 each on new blades for the saws. Blades make a huge difference.