FRIZ,
The advantage to a skidsteer front end is the ability to use (buy or rent) the vast array of attachments made for them today. As you pointed out the skid steer attachment carrier is the way to go. As an example of this I needed to use a hydraulic planetary auger to drill a few holes last year, I did not want to buy one for such a small job. I was able to rent the attachment for less than $100 (it was a Bobcat brand) it hooked right up and plugged in without any modifications.
Another thing to point out about the 400CX loader is it is self leveling while the 400X is not. This means the bucket or forks are kept level as you raise the loader arms, an important feature to me.