I bought my DC H10-30s in 1984 - they were my pride and joy for the next 15+ years! Still giving stirling service as back-up - currently back in service (see below).
.... then I discover ENC with a pair of DC H20-10s - wonderful! Can't imagine flying without them.
.... unfortunately one of the leads had an accident in the door of the Bo, so the H20-10s are off for repairs.
I've just bought the DC X-11, so I'll let you know.
Somehow Bose just don't fit the fantasy like David Clarks!
Dr