Sacman,
Looks like many of A'goners around here are in their typical "buy this, buy this" mode of what is their personal favorites. Makes you wonder how many of them "REALLY" read your post, and what your "wants and needs" really are.?
So you got a 15 watt Fatman, "tube based" I-pod player for your office. Not a bad little unit. Had a chance to listen to one myself. I'm guessing in an office enviroment, you're listening "near field" and in addition, you're limited in how much you can "crank it up". Personally, I think the B&W 601s3 would work well in such an enviroment. Of course, in your price range, and for your needs, there are many other choices, including the Energy RC-10, NHT Classic 2 or 3, Epos ELS-3, Usher S-510, ect. The fact of the matter is, their are many speakers in the $300 a pair range (new or used)that would work well in such an enviroment, and I for one wouldn't get to "hung up" on db levels (88db or even 86db should work very well in an "office" enviroment). Bottom line, find a speaker that sounds good, and "enjoy the music" and don't worry about whether or not, this speaker or that speaker might sound better. At your price point, it's not about one speaker sounding better than the other, it's more about which speaker has the "flavor" that you like. Basically you're dealing more with "differances" than with "betters". Just my .02 cemts.