What manual cutter do you have? I use a TX for straight cuts and a grinder with a pro-gres blade for any other cuts.I only really use a wet saw for stone nowadays.
Just a vitrex from screw fix it was only £80 but I find it keeps jamming and the last one stopped working all together. I just mainly use it for splash backs etc..
Get yourself a decent manual cutter, plenty to choose from, Rubi, Sigma, Montolit, I'm sure you know the score, there's been one or 2 discussions about them in the past!
Id probably recommend using a rubi if you havent used a manual before as they are easier. Check out tradetiler they have some very good offers. I had my montolit 63cm for 215 bargain!
I'm of the opinion that up to a certain point it doesn't matter what wet machine you use as long as the blade is of the best quality you will have no problem. I pay more for my blades than I do for the machine normally!.