Motherboard and CPU?

Solution
Best is a relative term. For the regular series, this:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($309.99 @ NCIX US)
Motherboard: Asus MAXIMUS VI FORMULA ATX LGA1150 Motherboard ($289.99 @ SuperBiiz)
Total: $599.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-01 21:45 EDT-0400)

For the hexacore series, this:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-4930K 3.4GHz 6-Core Processor ($566.98 @ SuperBiiz)
Motherboard: Asus Rampage IV...
Best is a relative term. For the regular series, this:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-4770K 3.5GHz Quad-Core Processor ($309.99 @ NCIX US)
Motherboard: Asus MAXIMUS VI FORMULA ATX LGA1150 Motherboard ($289.99 @ SuperBiiz)
Total: $599.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-01 21:45 EDT-0400)

For the hexacore series, this:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-4930K 3.4GHz 6-Core Processor ($566.98 @ SuperBiiz)
Motherboard: Asus Rampage IV Extreme EATX LGA2011 Motherboard ($409.99 @ Amazon)
Total: $976.97
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-01 21:45 EDT-0400)

For the extreme series, this:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i7-4960X Extreme Edition 3.6GHz 6-Core Processor ($1049.99 @ Newegg)
Motherboard: Asus Rampage IV Extreme EATX LGA2011 Motherboard ($429.99 @ Newegg)
Total: $1429.98
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-11-01 21:46 EDT-0400)
 
Solution
Of the three listed by Blaise170, only the 4770K is an 1150 CPU, and yes it's the best 1150 CPU, would suggest pairing it with an Asus Hero - that's the best combo I found over an assortment of 20 builds, the Hero combo OCs best, runs cool, handles DRAM very well incluf=ding the higher freqs and amounts, I run 32GB of 2666 on mine at 4.6