Chuck,

The 48GX was just released when I started school, one of the best $350 
purchases I have ever made. The emulator on my iPhone is my favorite 
app, works well and my phone actually fits in my pocket making it handy 
when I have to venture out on the shop floor at work.

There are several versions. My favorite is the i48 app by Daniel Parnell.
Of the versions I've tried it looks the best, works well, and is free. I 
believe it is also available for android.

Troy
RPN rules!