I think the G5 is totaly amazing! You will not be dissapointed.
Logitech mice = the best in the business. Why buy anything else?
Logitech keyboards = really decent but not the best. Depends what you want it for.
Logitech joysticks = average to terrible, avoid! Plenty of better solutions out there. The Extreme 3D Pro is possibly the worst joystick ever made!