Hi Andrew,
look upon it this way (as I am going through similar!)
1) once you find a nice cheap independent service place, you wont let them go
2) yeah, ok, a few niggles, but once they're sorted, they will niggle no more for some time if they've been done properly
3) I bought what on the outside looked like a tidy swb shogun for my mother in law. It came with an MOT that had a long time to run. When I popped it into my local (Douglas Motors in Wolston nr Coventry) garage, they put a prohibition notice on it because the chassis was made of papier mache!
So the jap stuff is just as prone to problems.
My v8 Disco is currently at the hospital in swanley. Just after i'd bought it, i thought "xfer box sounds a bit loud, wonder if there is any oil in it?" I managed to get a litre in (and the book says it holds 1.7!) then I checked the diffs, despite taking 4 hours to undo the drain plugs and fill plugs, i then found used engine oil (yes honestly!!). Again I sorted.
Then I got the bits to do the camshaft (thanks Richard at Beamends) well, it took me a week to do what should take about an hour - the oil drain plug took 5 hours to get off, the viscous fan took about 7.
Well, I gave up, and booked it in to see uncle Barry.
Well, the day before it was due to go in, SWMBO went to move it on the drive and it wouldn't go. AA said overfuelling, prolly airflow meter. So had to get it relayed in.
That was last wednesday, and with a bit of luck, tomorrow I get it back, with a stout dose of open wallet surgery - but do I care? no - why not - because I just love the sound of the v8 and the disco is a fine example of the beasty.
So dont regret it, just look upon it as preventative maintenance, oh and find a good indy garage asafp.
Si