You definitely don't need shielding tape. You don't even need it with single coils. Although at one point I'd done it to all of my guitars, it was all just a waste of time. If anything it just makes your pickups sound dull. All shielding tape has since been removed from all of them. If your humbuckers don't buck the hum, well then they're not really humbuckers are they? Those DiMarzios will be fine.
I really like Santos' setup. Tone Zones are my favorite DiMarzios. I love them in the neck and bridge. They just have a lot of flavor. I'm not sure why Ibanez chooses Air Nortons for a neck pickup. I personally think they're dull. They do have a good individual notation quality, but a tad lifeless for my taste. I'd rather lower a Tone Zone in the neck and get a bold full flavor. A lotta Bass tones come out of them.
I've never had an Evolution in a neck position. But a long time ago I had a guitar with one in the bridge and I did like it. Evolution, Tone Zone, Steve's special, all good bridge pickups. It just depends on what you're looking for it to sound like. You'll have to just see how you like one in the neck I guess.
When it comes to doing the swap, first thing to do if you're not familiar is take a few pictures of the wiring before doing anything. That way you have a reference of what it was like before to look at. It helps a lot if you ever find yourself not sure of something. If you already know how to solder, you have more than half the battle won. If you're just doing a pickup swap, it's really not very hard.
A couple pics from a recent show:
This one has a Steve's Special in the bridge, Tone Zone in the neck. Love this guitar man. The Steve's Special was the pickup I used for the Sky Down solo. Go have a listen again in my profile. It was just perfect for it.