If you want a cheaper, yet easy to set up wireless security camera, then a Linksys system is great: http://www.amazon.com/Linksys-Wireless-Internet-Monitoring-Camera/dp/B002OHDFOA/ref=sr_1_7?ie=UTF8&s=electronics&qid=1269979898&sr=8-7

Otherwise, the much more pricier Panasonic models are great. Check the specs out here: the BB-HCM371A: http://www.amazon.com/Panasonic-BB-HCM371A-Outdoor-Wireless-Network/dp/B0009PD0ZI/ref=pd_sim_e_3
BB-HCM511A: http://www.amazon.com/gp/product/B000NVPTZC?ie=UTF8&tag=thebubrocpro-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B000NVPTZC

To extend your range, you need a wireless router with external antennas. I would recommend the D-Link DIR-655 Extreme N because of its extended range: http://www.amazon.com/gp/product/B000LIFB7S?ie=UTF8&tag=thebubrocpro-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B000LIFB7S If you still need to extend your wireless range then, you need a wireless range extender. A low cost extender from D-Link is great and easy to setup, but a Hawking will double the range of a wireless router.

D-link extender: http://www.amazon.com/gp/product/B000MAXYHY?ie=UTF8&tag=thebubrocpro-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B000MAXYHY
Hawking: http://www.amazon.com/gp/product/B001DMEYCY?ie=UTF8&tag=thebubrocpro-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B001DMEYCY

Lastly, as an option I would get the Vitamin D automatic surveillance software. It free to try and much better than watching hours of video! Check it out here: http://www.vitamindinc.com/index.php