same here, i have a pair of monitor audio bronze speakers with a marantz integrated network player, and it's cool, but lacks some real bass and presence compared to a tower speaker. i won't replace them until my son grows up a bit and won't threaten to "fix" my stuff, guitars and hifi stuff included
true dat, even audioengine a2+ is some nice powered system for a reasonable price

won't have the lower bass of a 2.1 desktop system, but will have some better mids and highs.