News about Australia looking for a replacement of its Collins-class sub has been in the news for quite awhile now. http://m.theaustralian.com.au/news/features/three-way-submarine-race/story-e6frg6z6-1227361870149 Who should Australia select for their new sub? Politically speaking, Japan has the upper hand due to similar concerns over China. But concerning technical, experience, and cost, how do the three compare? Not sure how exactly they compare to each other. Also I don't think specific design proposals have been made yet but I don't know for sure.