I can tell you from n00b experience... get a taller stand.
I bought a stand/canopy combo from a LFS. The stand to bottom of tank is 32". I can also tell you that quite a few profane words have come from my mouth after hitting my head on the door opening whilst cleaning the skimmer,fuge, etc.
If I had it to do over again, at least 36", but probably more like 40".