The H110 should be a bit more quiet than the H100i due to larger fan size. I have never used a closed loop cooler to be honest. I have used aftermarket air for years and have never had a problem with it.
The NZXT Kraken Extreme should be something to consider if you plan on going closed loop as well. Here is another benchmark with the H110 and NZXT included.
http://www.guru3d.com/articles_pages/corsair_h110_review,13.html
You see how well the Noctua D14 holds up even compared to the best closed loop coolers. I like the big air coolers because if a fan dies it can be replaced and a big hunk of metal will not ever break. I always try to go with the simplest solution.
There are pros and cons to either way. With a big air cooler you have a giant chunk of metal hanging from your motherboard. Some people don't like that and I guess it could stress the board. Closed loop coolers do very well but can be loud and they have more parts that can fail. They are also expensive and don't cool the motherboard VRMs like an air cooler will and they can be hard to mount depending on your case.
Many, many people are going with closed loop cooling and are very happy with it. If you are comfortable with it and the pros outweigh the cons for you then go for it.
I don't have IM on this computer but I have yahoo messenger on my PC and laptop at home. If you still want to chat in a few hours I will be glad to.