I finally broke down and downloaded Comixology for the iPad and I have to say my experience has been very positive so far. I purchased "Justice League #1" and a few other comics including "Do Androids Dream of Electric Sheep?", something I've been meaning to get for a while. The cheaper price and my growing lack of storage space encouraged this choice.
I'm still buying certain titles in paper, I guess a nostalgic part of me wants to support the format and the stores that sell them, but for titles that I'm only mildly curious about, the electronic versions work.