PCPro reviews the Sun Fire X4140
The X4140 got an really positive review by the PC Pro in an article published today:
The X4140 performed well in our power tests as with both supplies linked up to an in-line power meter we saw it drawing only 16W in standby - that's 14W less than HP's quad-core Xeon based ProLiant DL360 G5. With Windows Server 2003 R2 pottering along in idle we saw an average draw of 200W and with SiSoft Sandra pummelling all eight cores this rose to only 305W - both lower than the DL360.
The X4140 packs so much more into its chassis than the rest, it's extremely well built and designed and easily matches HP's ProLiant DL365 G5 on price.