People tend to talk a lot about the quality of AD/DA converters even when they never heard them. And if you heard few models, you rarely have a chance to A/B them against each other. It’s a scientific fact that putting an expensive label to a cheap wine bottle makes it taste better so a blind test is essential if you want to know if the gear you buy actually is worth the money. Don’t listen to the sales guy, listen what your own ears say.
Can you hear the difference between the Mbox Pro and three interfaces costing up to six times more? Watch also the “Making Of”, they actually used Logic(!) to avoid giving Pro Tools/Mbox-package any advantages.