The OP can do as they wish. I'm just saying that from a person that this is all I do, the price is right. When you get the $250 guy, he is not licensed or insured. This is what I see all day long. In Florida you are supposed to be a licensed pool contractor and have a valid gas license even if you are just swapping out units.
Just get three bids from licensed companies and go from there. If all three companies are within the same price range then you can be assured the price is the price. If one is say $400 or so less, ask why they are so much less than the other quotes. Can you buy cheaper on the internet, sure. But if that unit comes damaged or doesn't work correctly out of the box, who are you going to blame? Been there seen that. In my business, if I sell you a unit and there is damage to it or if it is broken right out of the box, yes it happens, I can take it back to my supplier right then and there and bring you a new unit the same day. No calling around trying to explain what is wrong with it, waiting for a new shipment to arrive and sending the old one back.
Just some food for thought.