DELL XPS 27 AIO TOUCH I7 PC

I am on the verge of buying a DELL XPS 27 AIO TOUCH I7 PC. Anything I should be aware of or any suggestions welcome seeing its a lot of money.

Thankyou, I am still considering, what else can you suggest that will give me the same viewing or more experience and be reliable. Ihad no problems with olders DELLs but thats some time ago. I appreciate if you can point me a few directions to investigate.

Was thinking:
http://www.dell.com/za/p/alienware-x51-r2/pd?ref=PD_OC

Or
http://www.dell.com/za/p/xps-8900-desktop/pd?ref=PD_OC
Which graphics card-?
NVIDIA® GeForce® GT 730 2GB DDR3
NVIDIA® GeForce® GTX 745 4GB DDR3
NVIDIA® GeForce® GTX 750Ti 2GB GDDR5
NVIDIA® GeForce® GTX 960 2GB GDDR5
Which Monitor (IPS) 27 you suggest-?

Dell Monitor 4K-?
http://www.dell.com/za/p/dell-p2715q-monitor/pd?oc=&l=en

thankyou

I have a couple - the most used one in my kitchen. Actually quite nice hardware-wise.

But my advice would be not to buy one now as the innards are old. Also, even if you go for the flagship models the SSD cache is way too small for it to feel like a touch PC - I can regularly feel it bogging down to access the HDD, which kind of kills the experience. However, it's also still one of the few WQHD touchscreens out there.

I'd wait for Skylake and (most important of all) a fully-SSD config, if they do ever update the thing.