Had a look at the AVIC HD1BT, great bit of kit, UK price is of course not a straight conversion from dorrar, think the install will be just north of 2k!
Still the Alpine works out about the same and there is no capability to add in the speed camera DB, and you can't rip CD's to HDD for those rare moments when you haven't got your iPod.
Will post up the install quote when I get it.
(and having had to deal with c**p traffic on the commute home this evening I like the idea of TMC data....
whatever I get put in, I'll post up pics.