I have a TI-73.
lol. You are aware that the Ti-73 is just a dumbed down version of TI's 1990s era graphing calculators designed for middle school use, right?
I'm going to stand by my 86 until Texas Instruments comes out with a calculator that has a backlit screen maybe. The TI-86's interface is just so perfect, it does a lot more stuff than the 83/4 and even the 89, it's cheap, and to boot it's more visually appealing IMO then all the other calculators Texas Instruments has out right now. Even the voyage line :D.