Can anyone recommend a wireless CCTV system for my home?

Following a review by my local Police, after I was subjected to 2 thefts of heating oil and an attempted Burglary (whilst I was in my house), they recommended that I install 10 cameras, 6 indoor and 4 outdoor.

The outdoor camera's must also be 'non-visible' to thieves.

Any assistance in helping me make a decision will be greatly appreciated.