A few years ago I bought a cheapo (B+Q) mitre saw to do a specific
job. In the event, it's turned out to be pretty useful, but suffered
from a couple of problems, not the least of which is that it was
plastic and the guides aren't quite straight and square. Anyway, it
broke at the weekend so it's time to replace it with a decent one.
Does anyone have any recommendations good or bad?

Cheers