Recommend me a UPS

Preferably one which will shutdown my windows pc gracefully.

I used to use a APC one a few years back, it was pretty good, but it was well used when I had it and the battery went belly up and cost more to replace than the unit was worth.

i may buy another one at some point, but the electric here is pretty good.

This is what I have http://www.amazon.co.uk/APC-BR550GI-Power-Saving-Bac...

I tend not to instal any software on the windows pc, once the ups is plugged in via usb, you can set power options as if a battery is installed ie shutdown at 10% battery remaining.