The RSM 250 while only released to the public this year has been very successfull with good reviews. Certainly for the same money you can probably piece together a bigger/brighter system but there are advantages to the AIO(all in one) tanks and the RSM 250 is a great AIO.
If you haven't already read the RSM 250 threads over on nano-reef.com or other sites.
http://www.google.com/search?hl=en&c...&aq=f&oq=&aqi=