Steve,
I run a 2000 SE with 115000 miles on the clock. No squeaks, creaks or rattles and whilst the running gear is a little looser than when new the engine feels and sounds like it's just getting run in.
These are strong cars so don't be put off by higher mileage examples than you might normally go for, particularly as you say you don't do a lot of miles let someone else take another 20K miles of depreciation. As long as they've got FLSH they should be sound.
Check the inner edges of all the tyres, particularly the fronts, for wear. The outsides can have 3-4mm with inner edges bald and to the metal....
Watch out for the timing belt change due at 100K, likely to be around £350.
Enjoy!