I say go for the i7 860. Socket 1156 is cheaper, only need 4GB of RAM instead of 6GB, triple channel doesn't help very much, the difference between single and dual channel wasn't exactly amazing either. Also, the i7 860 is faster than the i7 930 in single/dual threaded applications, which is the majority, because Core i7 800 Lynnfields have higher turbo boosts than Core i7 900 Bloomfields.
However if you're either going to be using HD 5970s or GTX 295s in CrossFireX/SLI OR you are going to use three or more graphic cards, then get the i7 930 and the X58 chipset it runs on, which offers 16x/16x or 8x/8x/8x/8x, instead of P55's 16x/4x or 8x/8x/4x. Most graphic cards, even the HD 5870 aren't bottlenecked by 8x/8x, although if you do constantly upgrade, then the i7 930 would be a better choice, as LGA 1156 is going to die sooner than 1366 will.
The ASUS P7P55D-E Pro is a nice motherboard, two 8x/8x PCI-e lanes (most lower end models only have 16x/4x) as well as SATA III/6.0Gbps and USB 3.0 support, which will be decently futureproofed. The X58 is similar with SATA III/USB 3.0, but also supports trifire and three way SLI.