Never buy one of these things new. That's coming from a cheap arse. I've owned a few, and they've always been used. If you get the right one, you won't notice performance is down from the latest 'n greatest, and you can buy it for what you sold it for. We used to rent a lot too. If you truly plan to use it a lot, it won't be long before you say, "Man I could have just bought one." Again, meaning a used one.
Of course if you have a lot of money, and don't care, just disregard what I said....and I'm jealous.