"Daddy" junk wrote
No problem - 'quiet' models appear to be more expensive but I've no
problem with that if they are also better quality to go wit it.
I just want to buy one but am paranoid it is not going to do the job I'm
expecting and I will end up regretting. So which model is it to be?

I have an Al-ko SP4000 which takes up to 40mm diameter branches and I've
been extremely pleased with it. It eats the leaves and small twigs as well,
no problem; you just make sure and feed it woody pieces along with any
softer material to give it something to chew on. There's an automatic
reverse action should there be a clog-up, but once you get the hang of
feeding the beast steadily, that hardly happens at all. Thicker pieces get
crushed as well as chopped, so break down very well in the compost heap. My
last year's stuff made really good mulching material for this Spring. Ooh I
love my shredder! :-)

Sue