Karl,
I have used the next model up from the SP111 for a few years now and it really is a bulletproof peice of kit, its the street pilot 2610.
If you can find one at the right price they are faster, a bit smaller, use cheaper CF memory cards and ram and garmin still do cradles for them as they use the same "body" as the newer 27xx models I think, and the mapping CD's are fully unlocked with the 2610, but just one detailed area on the SP111.
I can get the whole of western Europe onto a 1 gig CF card
You can compare the two models from here.
http://www8.garmin.com/mobile/compare.jsp
Stu..
Edit....
Fleabay is showing at least 3 x 2610's in the uk and also the motorcycle power lead and RAM cradle are showing up , searched for Garmin 2610..