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My reaction to the prices you mentioned is much like that of Dan's. While the prices you mentioned could be fair, or even competitive for the specific models you mentioned, they seem to be very much in the realm of 'top shelf'.
I am curious as to whether this is your first table saw purchase and whether or not you have had a chance to use other people's saws at all.
When I am considering the purchase of mechanized tooling I haven't used extensively, I like to buy my 'learner' model as close to the bottom of the price range as possible. By actually using it, I come to realize what it's actual short comings are, with regards to my style of use. A $200 table saw wasn't good enough for my tastes, but using it allowed me to determine that the 500-600 price range is just fine for me. I had originally intended to sell off the first one if I grew out of it. As it turned out, I kept it for a spare and 2'nd purpose saw. I rarely have both set up a the same time, but there have been times when I want the dado stack on one of them and a conventional blade on the other.
On the other hand, if you can afford it going in, and the simplicity of getting off the list and 'done right the first time' is of import, starting out in that price range should remove any question of quality issues.
Not knowing the model numbers or local pricing trends, I would recommend taking the time to get 2 if not more price quotes per model you are considering. Spending that kind of money I would be concerned about retailers trying to double their money. Odds are if you are considering a purchase from a small business, that is a good estimate of how much profit they are trying to earn by dealing with the physical bulk of the item and the fact they really don't sell that many of them. There are several local businesses that would have been quite happy to charge me 300 to 500 for a saw that really wasn't any better that the one I picked up for 200.00
Hmm....a thousand extra bucks in my tool budget would have me looking at some really fancy router bits...