Bridge saws were just coming out when I bought my MK-101... In hindsight, because I often was asked to cut inlay tiles, I regret not spending the money on the bridge saw.
If you are just cutting straight lines, a 10" sliding table saw would do everything you ever wanted, although it will throw water everywhere -- I have been to the showroom for tiletools.com, their "saw shacks" are awesome to contain the mess, if you are cutting indoors! I've also found that NOT recycling the water helps keep the orifices clean and improves pump life, because you don't shoot any particles through the system, also reduces how rapidly your wax marks wear off during cutting!
Watch craigslist for deals -- people buy them to do a project and unload them afterwards, some cleaning, a new pump and a fresh blade (or getting an actual diamond dressing stone) and you'll be cutting!