Paul,
A number of options are available:
ColorVision Spyder2Pro – <
http://www.colorvision.com>
GretagMacbeth i1Display – <
http://www.i1color.com>
Monaco Systems OPTIX XR or XR Pro – <
http://www.monacosys.com>
There are others but these should do to begin with. ColorVision have already announced their new system and GretagMacbeth are due to do so this week so wait a few days before throwing your $’s around.