Anytime you order a suspension they get it CLOSE to what you need. Your shocks get set in the ballpark of what you are looking for, so be specific. Race or fun, race and fun. weight (be honest fatty) and riding style (sand, trail, pavement, TT, sand and trail, pavement and TT, trail and TT...etc)
Once you receive the suspension you have to dial it in on your own time, to get it perfect, but from the factory you notice a difference right away.
FOX EVOL is a great suspension system, I have not heard of many (if any) failures. I do know that they are supposed to receive annual services like any other suspension. Other than that, they are a good product. As far as air shock failures, you will see Custom Axis leading the way. Their early model air shocks were in competition with FOX but they had many seal failures. Word is, their new air shocks are great! But Fox has the better track record. As for the Rear Podium X. It is a coil suspension, weight dependent spring with remote reservoir. You dont have to go top dollar FOX for the rear, motowoz or a re-worked stocker from WIGGStyle will do you just fine if you want to save some cash.