I got my Everhot PEX crimper and rings from one of the online supply places, and its worked really well for both plumbing and hydronic heat work. It comes with replaceable jaws for 3/8" up to 1" PEX.
When you start to layout your plumbing and crimp fittings, make sure you look at the clearance you need for the crimper jaws and handles, which means you might do some pre-assembly of fittings in tight areas. With copper sweat fittings you can get really close up to joists and studs, and your only worry is starting a fire when you are soldering. With a PEX crimper you have to fit the jaws completely around the pipe at a right angle, and with a manual crimper you need space to open the handles and get good leverage. That's one advantage of electric crimpers, since you using the tool's electrical motor to make the crimp and you don't have the long handles.
If you expect to need quite a few fittings and shutoff valves, it's worthwhile to look at supplyhouse.com and pexuniverse.com and compare them to local prices. You might end up buying a few more fittings than you really need, but the online supply house prices are much lower than Lowes, HD, etc.
I also used hot and cold copper PEX manifolds, with shutoffs for the connections to my bathrooms and kitchen, and they have been very useful. I can shut off hot or cold water to each fixture individually, which is really convenient when you need to make repairs. My wife made fun of me (over engineered?) when I was running all the PEX, but later realized how nice it was to keep the water on in the rest of the house during any repair to a single fixture.