Enve is a waste of money unless you're loaded or racing for money. To say that you should buy an Enve fork without even trying one yourself seems a bit near sighted. I'm sure they're fine, but given the bike the OP is riding, I think something light and steel would be wise.

Get a good steel rigid from Salsa, Kona P2, etc for a suspension corrected 29er. Will be incredible. Steel is compliant and takes the harsh edge off bumps. Anyone who doesn't understand why you would want a rigid fork for commuting can't open his mind to your situation.

I love suspension and technology, but a nice steel rigid is tons of efficient and cheap fun.

Incredibly fast compared to a suspension setup. Lighter and most efficient. Standing up and honking on those pedals will become addictive. Anyone around you that's wasting their time sitting and spinning will be dropped like a slick booger.