Sweet. Here's what I have and what I'm after inc postage. Obviously cheaper for 2 sets due to shipping cost and a deal such as the Nankangs and set 1 and 2 of the Feds for £250.
4x Nankang NS2Rs, 120 treadwear (soft), £140 (~£70 each new with about 6mm of tread).
Tread depths (in mm, starting left to right on the photo, left shoulder at 75% width, centre, right shoulder at 75% width): 3.5 - 4 - 2.5, 2.5 - 4 - 3.5, 3.5 - 4.5 - 2.5, 2 - 4.5 - 3.5.
4x Federal RSR-585s (Set 1), £130 (~£65 each new with about 6mm of tread).
Tread depths: 3.5 - 4.5 - 5, 3 - 4.5 - 4, 3 - 4 - 4, 3.5 - 4 - 4.
2x Federal RSR-585s (Set 2), £40 (or can do them as a deal if you have any of the others)
Tread depths: 2.5 - 3.5 - 3, 2.5 - 3.5 - 3
4x Federal RSR-585s (Set 3), £100.
Tread depths: 4.5 - 4 - 3, 3.5 - 3.5 - 2.5, 3 - 4 - 3.5, 3 - 3 - 2.5.
Someone else has said he'll have 2 sets but not which ones exactly and hasn't replied after I sent pics, tread details and prices an hour or so ago.