Planning a new mini itx system

What do you think of these component for a mini ITX daw :
 
- Asus Z87I-PRO (I'm planning to use the built-in graphic)
- 2x8 GIG (Kingston HyperX1600 Mhz)
- i7 4790K
- 2x Samsung 128G SSD
- APEVIA X-Fit-200 Mini-ITX Case with 250W PSU
...anything else I'm missing ? (beside the keyboard,mouse,monitor)
 
Questions :
 
Is a single 128G sufficient for Win 8 OS + Sonar (and some common VSTs - Ozone, T-Racks, Syncmaster, AAS, Nomad, etc, but not a lot - I don't use Komplete,yet) ?
 
I may mix 1 SSD with a notebook drive. What do you think of the WD Notebook Drive 7200 rpm 500GB - as good as a regular desktop 7200 rpm drive ?
 
I found a Clevo based notebook OEM that supplies a system with the i7 (edit) 4710MQ 4810MQ processor, with almost matching cost (if I consider the notebook display monitor, keyboard, etc..) but much better portability. Would the desktop i7 4790K processor achieve better low latency compared to the notebook i7 4710MQ 4810MQ ?
 
Thanks.

I'm having problem ordering the APEVIA X-Fit-200 Mini-ITX Case with 250W PSU from Amazon and Newegg, from my country anyway (Malaysia).. My next option is a larger slim case with 450W PSU. Beside having more space for HDD, it can also fit a normal ITX board. Yet, it can still fit inside a travel case.
 
I'll just go ahead with the diy.. at least I know it will be more powerful than my current system.

tomixornot
What do you think of these component for a mini ITX daw :
 
- Asus Z87I-PRO (I'm planning to use the built-in graphic)
- 2x8 GIG (Kingston HyperX1600 Mhz)
- i7 4790K
- 2x Samsung 128G SSD
- APEVIA X-Fit-200 Mini-ITX Case with 250W PSU
...anything else I'm missing ? (beside the keyboard,mouse,monitor)

 
Will the 250W PSU be sufficient for the Quadcore i7 4790K + every other component listed especially when running the rig near full load with multiple Virtual instruments, FX plug-ins and DAW? 
 
 

Here's a list of mini-itx boards, with latency benchmark :
 
http://www.anandtech.com/...d-gigabyte-z97n-wifi/6