My friend Zach used to have an Alienware small form factor PC (i3 + 8GB DDR3 + GTX 645) that was on its last legs.
He was willing to spend about $1500 so I decided to spoil him with the highest quality of parts I could get him in his price range.
He already had a 1080p 60hz monitor, so I built it with that in mind. I almost got him a 1070, but I decided it would be a bit overkill for 1080p so I went with the 1060 instead. Still a fantastic card.
Also, if he was gonna spend $1500, I wanted to make sure it looked really nice. He fell in love with the Corsair Crystal 460X RGB. It was my first time working with RGB controllers and fans. so that was very exciting.
I chose all the parts based on the quality of them. His Alienware only lasted him about 3 years so I wanted to make sure this would last. I spoiled him with a Samsung SSD and he's blown away at how fast his computer starts up. Night and day difference from the mechanical drive he used to have. Also, to make his money well invested, I got him an 80+ Platinum power supply. Sure, it might be a little overkill, but it was within the budget and it's going to last forever.
Also, he didn't have access to an ethernet port where his computer is so I invested quite a bit of money into the wireless card as well. His Alienware could barely hold the signal with it's onboard wireless chip.
Overall, I'm very happy with how the build turned out. He can now enjoy playing Fallout 4 without having to turn the settings all the way down, haha.
Plenty of space to work in. It also looks really, REALLY nice. Plenty of options for RGB effects like cycling, breathing, flashing, etc.
The only thing that wasn't perfect were the plastic shrouds that cover the PSU and the HDD bays. They were kind of a pain to work with. I also felt like I was running out of room behind the back panel to route cables through, but that might have been my fault.