I ordered an 800E on opening day, and I've had some doubts about whether I made the right decision. I shoot landscape, primarily, and some low-res, intended-for-Facebook events. I've looked at some of the comparison images; some show little difference, others more. I went to a website devoted to Leicas where they're very anal about resolution. Here's the link:
I also saw this photo that was attributed to Nikon that seems to be a dramatic difference between the two cameras. Can't vouch for its authenticity or degree of processing. I also looked at some Canon-oriented sites where they showed images taken with cameras that had their OLPF removed. Pretty dramatic difference. I guess I'll find out whether the moiré makes any difference the hard way.