I have a wireless logitech (up on my tradelist, as a matter of fact), the old model for the Cordless Precision that is shaped most like the dualshock and logitech's PC gamepads, I found the rumble was great, all the buttons swift and responsive; and the analog sticks were superior to Sony's Dualshock 2 sticks. Never encountered any lag, either.
I use the corded controller because I didn't like the extra weight from the batteries. but, if that wasn't such a sticking point with me, I'd be using the wireless controller.