If you want a proper big shop saw with cast iron top and you have the room then for £500 second hand is the only way to go. The biggest problem with the cheaper portable bench saws is the crappy fence they come with which tends to bend at the end as you push the work through because they do not lock at both ends the second problem with cheap saws is they are hard to set up to calibrate when you first get them for 90 deg and 45 deg because they have no adjustment cams which makes adjustment a bit of a fiddle. An other thing to think of is choose a saw that takes 30mm bore blades as you will have far more choice. I have the Dewalt 745 site saw it has all of the above plus a fantastic fence which locks on both sides and is adjustable to a very fine degree to fractions of an inch because it uses gearing on each end of the table and a rod that goes straight through underneath and you just need to turn the knob to move the fence to desired distance then lock it with the lever. It is so good I have cut dados without a dado stack but just using a single blade and utilizing the fence by increments equal to the kerf of the blade I have also made finger joints without a jig using the same kind of technique and the mitre fence with a bit of flat wood.
https://www.angliatoolcentre.co.uk/dewalt-dw745-table-saw-pid38096.html
https://www.youtube.com/watch?v=tRC5rERrtdc
