I am also a fan of flashing to UK firmware since I had
Lumia 925 (which by default here in Romania the unlocked phones come with APAC HK firmware I don't know for which reason is this) and
Lumia 1020 (which was brought from Italy and by default was branded to Wind Italy), but for
Lumia 930 I picked Italy firmware (059W0H8 for Black / 059W0H9 for White / 059W0J0 for green / 059W0j1 for Orange) over the UK one.
I picked the Italy firmware after I tested several ones because it's the same as UK one (except the fact that the Italy ones comes by default with French/German/Italy keyboard layouts installed by default), also it's updated at the same time,
BUT while the UK firmware is missing in Internet Explorer the option to have Google as default search engine, in Italy firmware it's still there and I got used to this.
If I am wrong regarding the difference between Italy and UK firmware and there are more differences between these two, please correct me.
Thanks