Yeah, I looked at the links and that's the kind of upgrade in a pump I was looking for. But, actually, Jeffy's point about removing the pump altogether would probably be my speed just due to the small tire size and just my overall desire to remove as much dragging off the engine as possible (I've driven non-assisted sports cars at low and high-speed and it is actually ok with no-assist; but, with a Jeep it may be a load on you with the tires aired out, though, but that doesn't really bug me) But, of course, then, I get into future resale (if ever) probs and my girlfriend occasionally drives my Jeep and she probably won't appreciate the lack of assist.
Frankly, just kind of hoping that something else is causing the squeel problem, such as belt, air in line, or something else. Sounds like I don't have a pefect choice here should pump replacement be confirmed as necessary and I don't want to stay with "stock." :(