@Paul alan if you're at all mechanically minded (and I mean at all). Keep an eye out for second hand. You're 450 budget can pick you up a cast iron cabinet saw on ebay or gumtree etc. Of course these are significantly bigger and building them into your work bench would be different. I managed to get a Fox f36-529 10" cast iron cabinet saw for £80. It was in bad shape and failed to cut a test piece when I went to see it (which is why it was £80). But £100 on bearings a belt a new on and off swith and blade, a good amount of elbow grease and I have a really good saw. Much better than what I was initially looking at. It also has all the moving parts for the sliding table however some of the cast metal parts are smashed so I'll be building a new bed out of. Ply in the future once I move into my new home.
I suppose my point is, consider second hand. Some of the saws on there will be working long after we're all gone.