ugh
alright....you're gonna get some flamed responses here pretty soon. so i'll get my two cents out of the way first.
first off, if you hated the mbox and didn't like the software...then why are you going with Pro Tools? Why does this guy absolutely HAVE to have pro tools? Is there something he's expecting out of it that you can't do with Nuendo?
Second, why the 002? Do you really need 18 inputs? You said you were doing R&B/rap....so i doubt you will. The truth is, your artist needs to learn to stop watching so many rap videos about how so-and-so uses Pro Tools so that's the only way he has to record! A good engineer will get the exact same sounding mix out of Pro Tools that he would get out of Nuendo, Cubase, Logic, DP, etc. The reason people choose certain programs is because they like certain features or how certain programs edit. Pro Tools was one of the first programs I learned, I know how to work it and it does what I need to....so I stick with it. I've tried other programs but never really liked the way things were layed out, probably 'cause I was so used to another program. But that doesn't mean the other programs couldn't do what I wanted them to do. Just because some guy says he loves driving Ford cars and that's all he'll ever drive...doesn't mean i'm going to run out and buy one.
This is just one of the reasons Pro Tools gets such a bad rap, is because people think that it's the must have program not knowing really what it or other programs do. It's a digital audio workstation...a place for you to do your work! that's it. The only reason some Pro Tools projects you've heard have sounded good, is because who ever recorded/mixed them were good at it.
Tell your client that if he wants to use Pro Tools then he needs to purchase it for you to use because most likely Nuendo will do the exact same thing for him. However, that all being said if you REALLY decide that you want Pro Tools and Nuendo just isn't cutting it, look at this:
http://m-audio.com/index.php?do=products.filter&ID=protools
Just like any bigger recording studio, if the client comes in and says "We need to have ONLY a Les Paul guitar, a Manley Compressor, 3 neumann U87s and a Bosendorfer piano"....you can bet your ass the studio is not going to go out and buy those just for the one session. They will rent them from somewhere and bill them to the client.