If you have the money and will be printing enough to justify the expense, the new i1 Pro Photo 2 set up is as good as it gets. If you'll really be using a lot of different papers and constantly profiling, you'll probably want to add the i1iO table to automate the process.
If you will be printing mostly as an extension of your hobby or for the occassional portfolio or exhibition, the ColorMunki Photo works very well.