not sure since Viner appears to use different crowns as well as other frame bits in a haphazard mode, so may not point to a specific model or year, but for me a flat crown has some extra panache (DeRosa style points!) so I'd consider it a plus!
Can't go wrong with a Columbus SL Italian frame that cost you half of $75 (did I get that right?), it's a steal, despite the rust!