Thanks for all the extra info guys.

Maybe I was a bit unclear about it but I do not intend to run all instances of the game at 2650 x 1600. I only have both tanks and healers at this res., the DPS sessions will run at the lower res. of 1680 x 900. My primary plan is to 10-box on the new system, I was hoping it might also do 15, but that it seem is unlikely. That's why I presented the alternate option of using the i5-2500K system as a second system for a few chars, they will most definitely not run at 2560 x 1600, I've only got one 30 inch and it will be connected to the main PC. The session on the i5-2500K will probably be running something like 1680 x 900, and taking into account Heyaz's comment of one session per core, I would try to run 12 on the new system and only the remaining 3 on the i5-2500K.

As Mirai said it, and I red on other sources as well, I won't be before late 2015 that we'll get Broadwell with more than 4 cores, we don't even have a Haswell with 6 cores atm.

Heyaz mentioned he runs his melee slaves at a minimum sustained 25 fps, rfarris has his slaves at 30 fps. On my current system I have my slaves at 10 fps. What minimum fps should I aim at with my slaves to get decent game play? And what is the downside of running lower fps?

Putting all the gathered info together my new system is beginning to take shape:
- Intel i7 4930K
- Asus Rampage IV Black edition
- be quiet Dark Power Pro 1200W
- Cooler Master Storm Trooper Case

I cannot decide between getting an EVGA GeForce GTX 780 Ti Dual Classified or Asus GTX 780 Ti DirectCU. Are there advantages in getting the Asus since I'll get an Asus MB? Should I wait and get a 6 GB version when they come out, any info on when that will be or what kind of pricing we're looking at? Do I need a 780 ti or would (for example) a, or two 760 suffice?

Ain't got a clue what kind of internal memory I should get, nor how much. On the one hand I'd think 32 gig would suffice, on the other with the Rampage I get RAM-Drive capability which I think I would like to try out.

Next is SSD's. If I don't use the RAM-Drive I could wind up needing 4 of them? One for Windows, two in RAID for WoW and a fourth one for recording/streaming. I also came across the Asus RAIDR express PCIe SSD, don't you have one MiRai, how do you like it? If I would combine that with a RAM-Drive for WoW and would dump my streaming/recording directly on my NAS I wouldn't need any. Lot's of ???questionsmarks??? here.

Than we come to POWER. When MiRai is correct (and I think we can assume he is) than for starters one GPU would suffice with 4 monitors. When I upgrade to six monitors I would though need a second one, it's unlike there will ever be a third. What kind of PSU do I need, mostly in the sense of wattage? I'm looking at be-quiet for the PSU because I like their CPU cooler and I'm trying to keep the system nice and quiet.

Last thing I would like some advice on is CPU cooling. Currently I have a be quiet Dark Rock Pro 2, and I love because it's so quiet, I just have it running at full load continuously because I can hardly hear it (no I ain't deaf). So I could just get the new Dark Rock Pro 3 for the new system and be a happy man.
But there is still a part of me saying try water cooling, which got me looking at the Corsair H110 (it would fit into the Strom trooper, and in test it's the quieter one of the AIO big water coolers). It is louder than air-cooling, though kind of hard for me to imagine by how much without having heard them side by side. A review I found that compares the two, says it is up to 7 db louder (42 against 49) at full load, keeping an i7-4770K over-clocked @ 4.2 GHz at full load only 2 - 3 degrees cooler. Which would tell me just get the be-quiet of now, and maybe do a proper water cooling at a later stage. Comments?

Sorry for all the questions, but we're getting somewhere.

sP`!´Ke