Well I really wouldn't normally suggest building an i7 with that kind of budget because you really can't afford a good GPU after you have bought the guts for the main system but if gaming is of little concern to you then you can get a cheaper GPU and still make it work, since your games aren't that intensive anyway.
Nvidea cards work better for 3dmax, etc...compared to the ATI cards so I put a Nvidea card in this build seeing how it suits your needs. The psu and case will allow you to run SLI later on if you so choose. The case has plenty of room/cooling/ventilation for SLI and over clocking. These cases down below are cases that get sent back for simple fixes such as a loose wire, untapped screw hole, etc... They are virtually new cases in every sense.
You have a couple of good build lists from xthekidx and why-me.
Is the OS you already have 64 bit? If not, you need the 64 bit version to address more than 4gb.
Are the 3dsmax and photoshop applications very cpu intensive?
Can they make use of more than 2 cores?
Are they ram intensive, and can they make use of more than 4gb?
Are they I/o intensive? Random vs. sequential.
I am asking these questions because I have no experience with those applications and want to know.
The answers will be helpful to me to properly give advice on how to make them perform well