Looking for Ideas on a new Hack Pro build for Audio Workstation/Studio Computer

[Pro Tools Guy]

So I am starting a professional recording studio in the future and I am looking for a good hack to tie my future Pro Tools Rig together. I was thinking something along the line of some of the new higher end 2013 mac pro's yet to be released. Of major importance is having thunderbolt 2.0 and having a good chasis that can fit 3-4 PCIe cards(i'll eventually want to run pro tools hdx3 when I can afford) and offers alot of space for future RAM ADDITIONS and maybea couple tb+ hard drives for large sample libraries and for a record drive. The icing on the cake would be to have all of this and still have thunderbolt 2 on the build for backup, fast data transfer and to chain whatever thunderbolt peripherals I may need in the future.I'm looking for something specifically good at running DAW software like pro tools and Nuendo, as well as a bit of Avid Media Composer(far from top priority). As such I don't care for all that the new mac pro has done in the way of what seems to be a focus on film production and photography. I also do run ALOT of DSP audio plugins and virtual instruments at times. At the core I guess I'm looking for something on spec with the new mac pro's that runs pro tools and all that smoothly and effectively and has {censored}loads of power and ram for plugins and large track counts. Must be able to connect to pro tools native PCIe or protools Hdx PCIe or have thunderbolt. Less focus on graphics processing and much more focus on dsp audio processing.I am interested in using some of the new xeon chips that will presumably be in the new mac pro.Xeon E5-1650 v2, 6 cores / 12 threads, 12MB L3 cache, 130W TDP, 3.5GHz, max. turbo 3.9GHz, $583Either of these two would be butter.Xeon E5-1680 v2, 8 cores / 16 threads, 25MB L3 cache, 130W TDP, 3.0GHz, max. turbo 3.9GHz, $1723Xeon E5-2697 v2, 12 cores / 24 threads, 30MB L3 cache, 130W TDP, 2.7GHz, max. turbo 3.5GHz, $2614Anyone know about motherboard compatibility for something like this? Thunderbolt 2.0? Or will I have to wait until they launch and people attempt building hack pros with these types of processors?Any advice of any sort is appreciated in helping me find the right hack to power a pro tools studio.This is what an Avid HDX card looks like.http://www.sweetwater.com/store/detail/PTHDXcard/

The way things are going with plugin development for Avid's hdx dsp system I may be better off with a suped up hack pro and native card. There really aren't very many dsp plugins for the dedicated dsp cards and developers are staying away. So I may be looking for something on the very powerful side since it can run alot more plugs. At $8000 for an HDX card Price isn't necessarily an issue in this case.