Welcome aboard
For me SH4 wasn't the greatest* after SH3, for me it was too blue, too large, too boring - but I'm certain there will be great mods to improve that but the US boats never gained much attention from me. Obviously it's the one to get if you want US boats.
For the cost of them you may as well buy all three.
*just my opinion, not trying to flame or insult any SH4 players.
