Thanks everyone!
Wokka, the pickups are stock. I had to choose between pickup upgrades and a new kit this month, so new kit it was. The stock ones are much nicer than I was expecting so I'll probably end up leaving them for a while. I mean, they're not fantastic, but they sound totally OK through my amp, so it's not an immediate issue. I'd like to see how the Entwistles go, so they'd be my choice for an upgrade.