Good cordless keyboard and Mouse for PC?

I am looking for cordless keyboard and mouse
It would be nice if you can recommend the bundle
but I am also interested in buying them separate
I don’t want to spend so much on keyboard and mouse since I only gonna use them for regular activities (thinking $50~$70)

the features I want for the device::
– long battery life/charging dock
– soft, quite keys
– back,forward button on mouse
– backlit on keyboard would be nice

share your opinion and any recommendation would be appreciated
Thanks!!