You wouldn't have to rewire anything, but while you're in there, and spending money on very expensive pickups, you might as well put better pots and switch in there. I've had and used my Newark Street X175 for about six months, and the pots have gone scratchy already. The switch is the standard asian made variety, and it rattles in the middle position. It won't sound any different with better pots, but it will stay problem free longer.
As for the sound of Staple pickups, I've played some old ones. They're great pickups, brighter than a typical P90, and (even!) louder. To fit them to a Newark Street X175, you're going to need spacers under them to kick them up to the right height, or they'll sit too far away from the strings, the NS guitars have a pretty tall neck set.
Also keep in mind that with all the "stuff" inside those pickups, they're a little heavier than the average pickup, and in the worst case, they might dampen the acoustic response of your guitar somewhat - not a huge issue on a laminated electric archtop though.
I've just had my X175 pickups rewound, and I'm happy I did - they do sound better. I had them wound slightly lower than stock, more in the range of what my old ones measure, and they do sound closer now. The difference is subtle, but definitely there, and it did get rid of what I perceived as a grating, annoying upper midrange peak in the stock pickups. You'd think a coil is a coil, wire is wire, and 1 or 2 Kohm wouldn't make any difference, but it does - without wanting to get all cork-sniffer and snobby, there does seem to be something generic and ugly to cheaply made, robot-wound pickups. And I had the neck pickup underwound compared to the bridge, so they balance better than stock.
