Never seen those the words in the same sentence as volvo...
E39 wagon would be perfect but yes hard to find in lower km's. We have sold two the last year each had roughly 175000+ on them and some minor rust.. they were $9kish. The one guy has gas consumption down to 9L, not bad at all!
The E46 wagon is a good choice too, slightly less rear leg room but easier to find with lower km's and apart from the standard stuff no major faults. One customer of ours has had one for years and loves it.
If neither of those look at an audi wagon maybe, slightly more expensive though. They DO offer luxury reliability and safety.