Have only auditioned the 1066 in-store, but the consensus is that the 1055 and 1066 are virtually the same in the pre/pro... the addition of amps in the 1055 is said to increase the noise floor slightly, and is not necessarily audible.
So yes, the 1055 should be an equivalent pre/pro... plus you get a tuner... plus it costs less (reasons for that are not entirely clear).
1055 amps drawing power?... don't know for certain, but it's been my long-held understanding that they only draw 'idling' current unless they are fed a signal and are driving a load... correct me if wrong.
Here is a Rotel forum for detailed inquiries:
http://makeashorterlink.com/?H4E431B24