I'm inclined to go for a wheeled vehicle to cut down on maintenance and scavenging for appropriate track links but I wouldn't immediately discount the M113 series (being almost ubiquitous across NATO, getting spares wouldn't be so much of a drama).
I have personal liking for the German TPz1 Fuchs, doesn't have much in the way of armament (typically just one or two 7.62mmN MG3 MGs) and while it can mount a Milan firing post, it requires the operator to be halfway out the hatch to do so.
A lot of British and US troops would be familiar with it from time in Germany and/or the issue of the derivative M93 Fox NBC recce vehicle.
But it is amphibious, will carry up to 10 troopies and can travel up to 800km on a full tank of diesel. Also, it's also much quieter than similar vehicles.
Failing that, I have a soft spot for an older British vehicle, the FV 1103 Leyland Martian, 10-ton, 6x6 artillery tractor.
It ain't fast, it ain't pretty, it runs on petrol with a really crap mileage (1.24kpl/3.5mpg) at a top speed (on road) of 56kmh/35mph and it's big (well, huge would be a better description) but it has a 12-man cab, a 10-ton winch, very good ground clearance and will tow a load of 8000kg/17,600lbs and it just looks interesting (to me anyway!)
FV1103 Leyland Martian Medium Artillery Tractor
And just in case anyone thinks the guy on the bumperbar is a real short-arse, here's a pic with an SLR against the fuel tank for scale!
All images ruthlessly pillaged from here: -
http://hmvf.co.uk/forumvb/showthread...nd-Regiment-RA