That's a good question, when I first setup MachII I cranked it up to I think it was 45000hz, the machine was quick but the computer was basically non-responsive at that speed. So I run it at 25000Hz today just so that I don't run into problems with the computer response to my input (and it's not a little machine, I bought a Dell E510 P4). So I'm pretty sure the machine will go much much faster, it's either my parallel card or something in the machine so I run Mach at the lowest setting.
Also if I wanted to add more ports I would have to get a breakout box and then add a second serial port, if I can do that AND make the machine faster with the G100 then I figure I'm ahead of the game already

I'm not in a hurry, I have a large number of questions for the Gecko guys, but I'm very interested in what you find when you switch over. I use the machine today to make money to buy upgrades like this for it, I promised my wife any money made on the machine would go back into the machine... it's working so far

Thank You
-Paul-