[Blind-sysadmins] Looking for an ultra portable laptop

Hi all, I am in the market for an ultra portable laptop (3 lbs or less). My primary concern is the fastest performance. I have an Lenovo x200 which is on its last legs and need to replace it ASAP. Cost is really not a factor. Can anyone recommend a very high performance ultra portable? Should I get the x201 which is the replacement for what I have or is there something better out there. I looked at the specs for the x201 online and was dismayed to find only the garden variety of I5 processors available. Thanks Frank