Well, in my opinion if you go with x11 your coin wont be well distributed and will plummet in price if you don't get huge support(Hype the coin with features you mentioned in your opening post) and interest from investors since there are large FPGA Chinese farms who will dump all mined coins on first sight of an exchange. X13 is a bit better, but i would recommend to look at x15 algo witch is being tested as i type and it looks like it is really stable and great algo atm since there are no FPGA available.