^ I think your approach is very reasonable, Feri, and well thought-out. I think if you follow this logic, you will have meaningful measurements using the Mini-DSP.
I just read the manual for the Dual Core 2.0. Wow! What a sophisticated unit it is - way more so than the 8033. I would imagine that XT32 plus this unit would give a fabulous bass result. It also has far more sophistication in its features than Audyssey Pro does (although it corrects only for the bass frequencies,, but can measure the full range, which is how you will be using it with REW.
When it arrives, how will you be using it - as a bass EQ or simply in conjunction with REW. I would be massively interested in how you get on - maybe you'll start a new thread for your experiences with it?
I shall so look forward to your impressions and test results. I am interested in the AntiModes myself (mostly academic at this stage). I would start your own thread for it if I were you - and be sure to post the link to it here!
Do you have a link to the Robert Green interview?
I am the messenger here, so there is no cause to get upset. I don't know where you got the idea that you would be able to use your laptop's audio if your laptop has no HDMI port. This thread was established to specifically leverage a new capability in REW 5.0 beta 10 that added support for laptops with HDMI and USB mics. AFAIK, nothing has changed with regards to how to do a legacy connection.
If you read the REW documentation, it states: "Equipment Needed: A soundcard (internal or external) with line inputs and outputs. Note that most PC and laptop mic inputs are NOT suitable and should not be used (they have too much gain and most suffer from high noise levels and limited bandwidth)." You may read the complete description of requirements for a legacy REW kit here: http://www.hometheatershack.com/roomeq/wizardhelpv5/help_en-GB/html/gettingstarted.html#top.
Also, from the Cabling and Connection Guide:
You will require a soundcard with a line-in and a line-out jack.
A microphone input (mic-in) on a soundcard is not suitable (many laptops only have mic-in).
If your laptop is limited to a mic-in port with no line-in, then you'll require an external USB soundcard.