My one comment on suspension forks is that coil forks are not particularly useful, and probably not worth the added weight. Air forks are excellent, and I could definitely see wanting one, but the cost is significantly higher.
The biggest problem with coil forks, is that the spring stiffness is set at the factory, and it's usually a stiff spring, so that larger riders don't blow through the travel. When I had a mountain bike with a coil fork, it was effectively locked out, because I didn't weigh (160 lbs) enough to move it. A typical mountain bike ride would use at most 20mm of travel.
Once I switched to a bike with an air fork, it was a night and day difference, the ride was much smoother because I set the spring rate to match my weight. The drawback is that the air fork alone cost twice what the entire previous bike did.
Suntour does make some lower end decent forks like the XCR32-Air that would be good on a commuter bike if you have a rough section of road. It's $200 to upgrade to something like a Raidon through Suntour.