Ok, we're looking at (something like) £395+vat for the 257x20 (T20 caliper kit), and £465+vat for the 298.5x24 T20 kit. The existing 284x22 T20 kit is currently £415.51+vat by comparison.
The 1.62/1.75" piston T20 caliper gives you just over 25% extra piston area over the GT caliper (plus better modulation, cheaper uprated pads and all the other race 4-pot good stuff).
Oh, and all three sharing the T20 caliper means you can swap from kit to kit by buying the discs/brackets/spacers etc if you change wheel size! :-)
So, "interested" in 257mm so far is:
1 - Todd
2 - seaneyb
And "interested" in 298.5mm so far is:
1 - ryanjfac
2 - arnell (post from last year)
3 -
4 -