There is, amidst the ongoing doom and gloom, a literal growth industry in the record business: history. Reissues are coming in bigger physical sizes and grander retrospective scope, to the boon of collector-maniacs and at the expense of most wallets. But size is not everything. This survey of the 10 best archaeological releases of 2016 runs the weight scale from the truly spectacular – the audio-visual excavation of Pink Floyd's psychedelic and experimental eras – to single-disc concentrations of previously-unknown work by crucial, then-emerging voices. The result: something for every budget and obsession.