I took the plunge and got a 1D Mk3 as well, bit of an upgrade from the 20D,
Heres one i took at Gigrin on Sunday, 1d Mk3, 600 F4L and 1.4 TC, threw me a bit with the ISO of 2500 lol but then i realised it had changed it itself, not used to that happening lol
http://www.cookster.co.uk/gallery/albums/userpics/10002/0819-151014-01.jpg
very nice... i really must get there one day soon...