Sadly, you will likely be unable to find two commercial production quality cameras for $1K. Even a high quality camera will likely require a budget of more than $2.5k, actually closer probably to $4K.
There are cheaper, average quality consumer cameras out there for $600 to $800, but you're still looking at more than your indicated budget to get a pair.
My preferance is to shoot with a matched pair - been doing it since the old AG456 days of SVHS, and even before that with a couple of consumer panasonics. We now use two Canon XL1 models and a GL2, but will soon be moving into high definition. That is likely to be a pair of the newly introduced Panasonic AG-HMC150 AVCCAM models.
Although, in order to make this move I have to consider upgrading my editing equipment first to the latest iteration of Mac Pro with Final Cut Pro. So, I might have to settle for HDV cams in the consumer bracket, like the Canon HV30. Two of those, along with required audio, LitePanels lighting kits and bracket support enhancements, will still run me about $1,200 each even though the cameras might be found for less than $700 each if I shop around.
Tough decisions - all of them costing money. So, if you're just getting into the business, or seeking to grow, diversify or expand your current video business, you need to make sure you have the client base, or potential to pay for a major investment in the acquisition, editing and production tools you will need.
