EG-X HD is by far the best BR-ship, in my opinion (directly followed by PIRANHA HD). the hardest BR-combo in the whole game (3x/4xBR beat zico;bridge section) is almost 'easy' with EG-X
AURICOM HD takes 3rd place in my list, and GOTEKI 45 HD is great too. it seems to me, that it was made just for sebenco
sub 27 venom time is 100% doable, not sure about the other ships