Can anyone recommend me a bike lock/chain ?
If your after a chain for home then only solution is an Almax chain.
The Fagettaboudit chain as mentioned can be bolt cut in 42 seconds.
Watched Almax nearly get booted out of the NEC bike show a few years ago as they were cropping "sold secure" chains in less than a minute. Quickest i saw cropped went in about 15 seconds and that was over £100 worth of chain.