John, you read right.  The only very high-land Nepenthes I've seen
that were healthy enough too look nice were some N.burbigea (sp?).
So far besides for those four nearly all other species have been
a disappointment.  As Tom Kahl pointed out, however, these plants
tend to get stressed in summer.  That is the only time I've had to
visit other growers.  So I doubted, but now I repent.  Please forgive
me.  Hail N.rajah!
Dave Evans