InfoWorld published a brief review of a new IBM x3550 server, focusing on virtualization. It received a score of 8.4/10 (Very Good) and providing this bottom line:
The System x3550 marks a definitive step forward in IBM’s march toward commodity-server virtualization, offering a system tuned to the needs of a virtual environment, coupled with high-level management tools integrated into its Director product. The server, not without it’s share of IBM design quirks, performed well in the lab.
If you are planning to use this machine for virtualization may worth take a look.