Basically I'm happy to go along to any local site and I don't mind playing alongside rental players, so long as I can use my own kit and buy paint at a sensible price.
The going rate at a lot of sites seems to be about £45 - £50 for entry, including your first box of paint, with extra boxes at £25 - £30/box, which seems fair. What put me off diamond wars was the overall cost, £60 entry and first box of paint + additional boxes of paint being £45, which seemed a bit on the expensive side. Having said that Paintfest looks a bit more reasonable at £60 for 2 days with paint at £25/box, although is only cheaper pro-rata if you shoot a minimum of 2 boxes a day as the entry fee does not include paint.
If Unique Pursuits now allow walk-on players I'm happy to come along, assuming the pricing is reasonable and they have HPA available.
My brother and one of the people I know that played at Paintball Valhalla might come too, at this rate there could be quite a few of us.