Mobile workstation needs

Question

Hello all, Im new to the Adobe forum and have some questions regarding  mobile workstation needs.  I have grown very accustomed to using laptops and in the next month going to acquire a new machine.
First off all, I dont want to offend those that use Macs, but I love Windows based systems.  I have used both, but I am the most comfortable with with win 7. 
He is s a little background,  I have used Alienware MX17 and DELL MX17 XPS for  a few years, the Alienware crapped out a year or so ago  and the XPS is still running well, but Im finding its slow. I do a lot of post editing for others and a lot of my own images. My files are averaging 300MB + and sometimes up to a GB. I use mostly PSCS6 and some NIK software and a couple Alienskin plugins.
I have all my files kept on ext drives, so my needs are to maximize performance and stability.
I was thinking of another Alienware, but looking into EUROCOM , Malibal, Lenovo, HP, Origin, Sager.   My main concerns are fast processors :  Intel i7 extreme or the Xeon.  I want to max out the RAM at 34gb. I also know I need the best NVidia graphics , such as the 8800 SLI cards.
If anyone has suggestions that I am not looking at, or help in deciding on a machine.  I am mostly concerned with customer service/ after purchase care, good construction, and last but not least, I like a nice , simple, elegant, black case. I know it will be a beefy machine, and I need 17" displays. 
Thank you, for any help !!!

Answer 1

Well, I thought Id update, just in case there is "anyone" that has been sitting on the edge of their seat.  (sure)
After a lot of "loving ridicule" from my Sons, I decided on the Eurocom.
What I have now:
Dell XPS  MX 1730   Mobile Workstation
4GB RAM
2 X  512GB 800 series graphics
Intel core 2 Duo
2 x 750GB 7200 RPM Seagates HD
Win 7 home premium
BLAH, BLAH etc
Coming next week:
EUROCOM Panther 5 Mobile Workstation
Intel i7 4660 Extreme
32GB RAM
Nvidia 8GB GTX 980M 1536 CUDA
2 x 1TB SSD Samsung EVO
Win 7 home Prem
BLAH, BLAH
Now, Im hoping that Im not expecting too much of a difference in Photoshop  performance. I hope its not " Oh, this kinda faster".......  Im not expecting to have my "mind blown"  but I just hope I dont feel like I spent so much and get a mediocre experience.
I should see a good amount of difference?
Now a bit of backstory as to WHY Im being so extravagant.
Ive been living in a financial, physical, emotional and psychological HELL these last 5 years.....  Im finally seeing a bit of a light, got in some money, nothing outrageous, certainly nothing compared to what I used to make ( technically, poverty level, but an income, none the less)
I have been dealing with second hand systems after my beloved Alienware died. So I felt since Ive been in the same clothes, nothing new to wear, tattered everything, I DESERVED this.   I just hope I made a good decision on the company. I care about "aftercare" a LOT. Since I tend to constantly buy the 1 in a billion whatever item that will be defective.