CPU - No brainer, there isn't a reason right now to buy AMD besides niche areas.
Motherboard - ASRock, MSI, Asus in that order.
RAM - Corsair, G.Skill, Patriot no particular order. Currently long as they are 1600MHz and a good price.
GPU - eVGA for Nvidia, XFX/MSI equally for AMD
PSU - Corsair, Seasonic, Antec in that order. Seasonic is the OEM for most Corsair units, but I like the PR guy and Corsair's CS better.
Case - personal preference and usage preference. For myself, I tend to lean toward Corsair and NZXT.
SSD - Samsung and Corsair / HDD - Seagate storage, WD Black and Samsung F3/4 equally for regular usage.
Cooling:
Air Heatsink - Thermalright, Noctua in that order.
Water AIO - Corsair, Antec, NZXT In that order
Water Custom - Watercool Heatkiller, EK, Swiftech in that order
Visual:
LCD PC - Samsung, NEC, Asus, Dell in that order.
LCD Workstation - Dell, Samsung, NEC in that order.
Projection - InFocus, Epson, Optoma in that order.
This is just stuff I would buy myself and most personal preference from experience.