Planning an upgrade, boxer details and current to planned new machine details added.

[MadMilitia]

My boxer details:

Play from: Healer perspective.
5 x dedicated boxer
2 melee
2 ranged
1 healer

Current performance in cata zones:
Slaves (forced 10FPS, low quality, 1920x1080)
Main (normal quality, 1920x1080)
- registers 30-40 fps, 20 fps in Ogrimmar

Isboxer: 1 region, stacked, swap.
Addons: Recount, DBM, Isboxer, Mogit

My current rig:

Processor: Q9650
MB: EVGA 780i
Ram: 8GB
HDD: WD Black 1TB
Video: 2x 295 GTX (non-sli, dedicated physx 2ndary)
OS: Windows 7 Pro
IO: G510, Evoluent left handed edition
Case: Antec 900


My planned rig:

Processor: I7 2600
MB: ASUS P8Z68-V PRO/GEN3
Ram: 16GB
Primary HDD: Crucial 256GB SSD
Secondary HDD: WD Black 1TB
Video: 2x 295 GTX (non-sli, dedicated physx 2ndary)
OS: Windows 7 Pro
IO: G510, Evoluent left handed edition
Case: Antec 900


Now the questions.

1. Will the new rig be able to handle (better than 20fps) high settings on the main and 20fps on the slaves?
2. Will I need to water cool this thing at stock speeds?
3. Will it bottleneck at the GPU (single card) ?
4. Will adding a secondary 1920x1080 display hinder performance too much? I don't want slaves on it. Just a free window.

Thanks in advance. This upgrade will cost me approximately $1,000 as of the listings.