A PT Question as a "deck"

I should know this and have searched for an answer I can place confidence in, but have yet to succeed.

I have had the benefit of using PTHD in the past for my work, but am now going to be doing a project more remote and out of the studio. PT will ONLY be used to capture tracking and minor editing (ie assigning new playlists). NO plug in concerns nor mix needs as I'll be using it essentially as a "deck."

I have a non HD version at home but am concerned about latency. I'll be using all external outboard and convertors, apogee in - benchmark out... and as it stands I can set the HW buffer down to 64... BUT I'm a timing freak and can sometimes feel that in the cans so to speak.

I've seen that AVID is claiming that the 32 buffer on a PT Native rig is lightening quick. But I'm trying to determine if this is true in practice by users and dependable in a way that is noticeably better.

OR... should I just buy and old HD1 card and use it to track (32-36 tracks max).? I love portability, but could perhaps get by with my old PT9 non HD setup and deal with latency as a second rig for those instances.

I'm really torn here and could use anyone's advice who's had similar challenge/solution.

Thanks all.