Hi Jay and Bill,
To make a decision on which HP to buy I want to let you know that I don't think you would be disappointed with either the Custom 3 or IMAGE. In fact eventually you may want both. Here is how I use them and found the best solution.
Do you need optimum sound or convenience? Custom 3 is the best sounding personal monitor that is available on the market. I realize that I am biased since I voiced it but this is the comments that I am getting from the experts. This is why we have the guarantee if you don’t agree return it in 30 days. If you want this model you need to wait up to 60 days. Sorry but we are making final changes that allow for easier manufacturing.
If you are walking jogging or moving a lot Custom series is more stable to wear. If you catch your hand or something on the cable you are less likely to pull the PM out of your ear because there is more shock absorption on the design.
If you are using your PM more at work or a situation where you need to talk often then IMAGE is your model. It loads quickly to your ear and sound great. I am really picky about my sound, being an audio engineer but I can listen to either model because the both sound awesome. Custom 3 just has a more accurate EQ and the top end of the response is so smooth it sounds like butter!
Here is my prediction for sales. More people will choose IMAGE first over Custom series because sound is not their highest priority, ergonomics are. It is very easy to use, looks great, and very comfortable. It is also smaller thus a little easier to move around and store than Custom.
Thats my two Hertz!