I was going to wait for SH5 to go on sale (and get patched) before buying...
It looks like the sale is already here, Gogamer has it on sale for $36.90 for the next 48hrs, so I bit and should have a copy much sooner than I expected:
http://www.gogamer.com/Silent-Hunter...VVviewprod.htm
Posting in case anyone else was waiting for a sale.