M.B.
DON'T go with Summit Pools. Their slogan is swim in 29 days or less. It's BS. They might be called Royal Pools now. We had a horrible experience with them. Project manager was never around and so many things got built wrong. With that being said, we went with salt water which I do love, and a dark bottom. We might have gone a tad too dark on the bottom because the sun hits it all day and in August it's almost too warm to swim unless you get umbrella's to shade it. We also went with the heater for the winter which I am glad we did. They tried to talk us out of it. Get lots of recommendations and try talking to the people with pools and not the people they recommmend. They will most likely only let you talk to the ones that were happy. Also try not building during the peak time when every one else is. That way you may get a discount and you might get extra attention on your pool.If they are too busy like ours was you will have all kinds of problems.
Good luck!