The best thing to do here is just buy a cheap analog console. You can even buy one with on board effects. Now you can monitor with no latency and effects and still record dry into pro tools. Later on you can even do some analog summing. Less headache for roughly the same cost of buying other audio interfaces. Infact i would say it is a necessity. Even the pros with an expensive HD rig are mixing on their Neve and SSL large format analog consoles. Pro tools to them is just an editor.
http://www.digstation.com/ArtistAlbu...=WayneDawkins2
http://cdbaby.com/cd/..WayneDawkins
http://www.myspace.com/waynedawkins