Geovision is good stuff. One of my DVRs is a Geovision.
I'm not a fan of WIRELESS systems. Hardwire is better in every case, some of the EXPENSIVE wireless stuff is good, but its always far more expensive than hardwire and typically lower resolution and frame rate. In the long run, I think hardwire systems are simply more reliable and much less expensive (even after installation) too.
Prices have dropped on all systems.