Or, are you saying that you've already started all the (circa) 17 subs you mentioned, above? (Don't be "bashful" - I could probably name just about that many builds - seriously started, with progress continuing - for years now! )
I totally agree about the earlier Soviet subs - but as I understand it, Alanger either has already or will soon come out with a Yankee, early Delta, Hotel and November - the latter two of which you've already built! (If you've forgotten that, then you really are building too many subs at once! ) A Whiskey/LongBin would be cool - or any (decent-sized) model of a Whiskey, the most numerous class of submarine ever produced, in world history.