Got the Rev B
Thanks for all of your input. I ended up getting the Rev B., and I am quite pleased so far. The fan noise is a lot quieter than I'm used to (don't really understand all of the complaints). I've had two Shuttle SFF pc's before this that were supposed to be "silent" and this iMac is quieter than both were. In the end I felt that the $400 difference would be better spent on software than on having the absolute latest hardware, especially when any performance gain is likely going to be difficult to notice.
Thanks for all of your input. I ended up getting the Rev B., and I am quite pleased so far. The fan noise is a lot quieter than I'm used to (don't really understand all of the complaints). I've had two Shuttle SFF pc's before this that were supposed to be "silent" and this iMac is quieter than both were. In the end I felt that the $400 difference would be better spent on software than on having the absolute latest hardware, especially when any performance gain is likely going to be difficult to notice.