[noname219]

That's good to know.

Meanwhile, I found the same Dell desktop as I mentioned earlier but for 1589$. Here's the stuff :
XPS 8700
Operating System : Windows 8.1 (64Bit) Canda MUI
Processor : 4th Generation Intel® Core™ i7-4770 Processor (8M Cache, 3.4 GHz)
Hard Drive : 2TB 7200 RPM SATA Hard Drive + Intel® SRT 32GB SSD Cache
Video Card : NVIDIA® GeForce® GT 635 1GB DDR3
Memory : 24GB Dual Channel DDR3 1600MHz - 4 DIMMs
Optical Drive : 16X CD/DVD burner (DVD+/-RW), write to CD/DVD
Monitor : Dell UltraSharp U2412M
Keyboard : Dell KB213 Wired Multimedia Keyboard, canada MUI
Mouse : Dell Laser Mouse
Including Microsoft Office + a bunch of non-interesting stuff

Pros : mostly the same processor than I was looking for, larger hard drive, impressive memory, monitor doesn't look that bad (but quite pricey for 400$!!!), all comes from the same source and all the stuff is already installed and mounted
Cons : SDD is too small, video card is alright, and the keyboard/mouse might be shitty (an assumption), don't know the watts of the power supply, I don't know if I'll break the warranty seal if I change pieces (need to check that)

I'm thinking about buying a few other pieces and upgrading it (a better video card + keyboard + sdd). In the end, it's gonna cost me more or less the same than if I build my own...