TA is an absolute power hog. It will bring any G3 machine to its knees in a hurry (especially if you remove the 250 units limit). for that i would highly recommend the G4.

in fact...i would recommend the G4 for just about all of those games.

and USB joysticks are a dime a dozen. you should easily be able to find one which will work for your games. there are also quite a few utilities available which allow you to assign USB joystick buttons/axis movement to various keystrokes for games which do not support InputSprockets.