I'd really be interested to see how your cuts come out with a grinder. Can you post a picture?
How clean can you really get cuts with a grinder?
I use a clinker and a very small wet saw (weighs about 20 pounds) for small tile jobs. I can usually set it up in a basement or balcony (or even bathroom).
I just can't imagine getting nice clean straight cuts with a grinder.
The grinder should be for cutting out things that will get covered, like a heating grate or the shower valve eschution. Other than that you should be making cuts with the tile breaker and those cuts should be the ones on the edges of the floor that will be covered by base (NO SHOE ARG!).
Nobody is cutting porcelain or ceramic with a grinder that looks as good as cut with a wet saw. That picture posted is limestone which don't count. :whistling
There's a fine line using a grinder and breaker board, knowing the limitations and boundaries are what separates the pros from the wanna bees.
Great for floor where your cuts get hidden under base, not so good for a shower or tub surround if there are intricate patterns and such.
The smartest guys use a combination of all three -grinder, breaker and wet saw, knowing when to use each one for the greatest gains.