First post so be nice

I am about to buy a new license for Arena and so i need a new laptop.
I kinda settled on Asus G75VX http://www.asus.com/ROG_ROG/G75VX/ and I want to use it with Matrox TH2Go. Seeing this laptop has only HDMI and DP and as the nVidia website says:
"Display Support:
Up to 2560x1600Maximum Digital Resolution
Up to 2048x1536Maximum VGA Resolution"
I wonder if i could actually use my Matrox on High res. and in High res i mean 3x720p and even 3x1080p
Anyone have opinion n that machine, video card ( nVidia GTX 670MX 3GB ) connections ?
Or advice about another machine etc .
The first laptop i liked was a Lenovo with SLI cards but as far as i know i will not benefit from that neither in Arena neither in Adobe or VVVV.
Thank you in advance to anyone with advice for me
