So, I've been in the wilderness for a while (Have had a lot of work come in recently) and haven't been checking up on here as often as I should..
Just so you guys know, I have successfully installed PT11 on my machine.. It has only crashed once (not bad for the first release of a Program) and I have been able to run 2 of my most recent sessions successfully! (All that I have attempted, they're fairly intensive post sessions for films)
I purchased an MBox Pro with PT10 bundled (I got a free upgrade to PT11 because of the purchase timeframe) for $1000AU
I was running PT 10.3.5 with no worries (except for the 32bit architecture) Apparently Avid recommend running PT 10.3.6 and PT 11 simultaneously I have updated to 10.3.6 for 32bit and installed 11 for 64bit.
Everything is working as it should!! I understand that I cannot use my 32bit plugins in PT 11, a little annoyed about that, but when more 64bit AAX plugins become available, things will really start to improve..
I haven't had the chance to install any HD stuff on CustoMacs as I don't need a HD system at home (and my business isn't large enough to warrant the expense of purchase) I do use HD systems in various studios though, and I am a little concerned about the time spent waiting for high end users to upgrade. Hence Avid supplying PT 10.3.6..
If you have any doubts about standard Pro Tools running on a CustoMac, hopefully there is enough information around to quash your doubts. I can't speak for HD systems.. Yet..
**Sorry important edit**
Many thanks