I'm with Carl. If you are looking for a good sounding, inexpensive system, I'd get the Sharp for $80 or so and team it up with some decent, inexpensive speakers.
The little Polk R15's sound very good for $99 with the Sharp. A bit laid back, but they have surprisingly good bass and are very listenable. You can do better if you want to spend more but for this price range (new) they are great. I'd be curious to hear how they sound versus the Alesis which I have never heard. You can also get a set of real wood ELT's on sale at AV123.com. Those would also sound good with the Sharp in an office.