You guys aren't making it easy to decide! I was inclined to just get a TSU-7500, and spend little time programming it (since I can reuse most of what I've done w/ my TSU700). However, based on the recent postings, the 9400 is very tempting to wait for, assuming that a PCF can be easily ported to the 9400 (no major work on reprogramming or graphics), yet still give me the option of 2-way RS-232 for future use if/when I have more free time to devote to making changes (assuming 2-way RS-232 will be available for the 9400). I've got 4 devices that have RS-232. Although not required, would be good for things like status info.