fal900

I am in the market for a 4 channel system looking at the revo 4 channel system or falco. Budget $500.00 Specs on both about the same. I realize revo has some sort of proprietary connectors. Seems like systems in this price range are about the same just wondering what would be better overall between these 2 systems revo camera resolution are 540 lines with falco system I am looking at has 420 lines any advise would be appreciated.