Best options for video output

[Inopia-Vi]

Hi all,
just looking for advice and if some of you have already used a setup similar to the one I want to have.

My goal: Have 3x1920x1080 monitor and my MBP screen

Computer: MBP early 2011, 2.2GHZ, 4GB ram with 1GB VRAM, 15'

What I want to do:

buy the Matrox TripleHead2Go Digital edition (click for specs, its the one before the last one)

and hook up that best to the apple mini-DP to DVI

I looks like it would work BUT, i am not 100% sure that i will be able to obtain my desired resolution since the DP edition of the Matrox claim a 3x 1680x1050 max resolution....

Any experience here?

Thanks in advance