Well, sadly I know a thing or two on decking.
IMPO, if you're doing the work yourself, do IPA, more work, some maintenance with it. But much much nicer looking then composit.
I like Fiberon decking personally.
There's a channel on YouTube called The Build Show. They've done a video on composite decking. I'd check it out.
Down side of composit, if you're in a wet area it can be slicker than a dog turd, moves a lot due to temperature swings, you do need to install to manufacturers specs in the Temps, you really want your framing to be 12in o.c, and with that, in super hot days you'll feel it flex. Some composites are better than others for color fading and such too.
Lastly, make sure your house is flashed correctly, I suggest trexseal. And use joist tape on everything. The 'it's pressure treated so it'll last forever' is a lie, tape everything.