Good question! I thought about the 250S, now 270S for replacements for my Volvo Penta 41A's.
But the price they want for the Hundai's I would buy a Volvo D4-260.
We instaled HYUNDAI SEASALL S 270 in BAYLINER 2452 with BRAVO 2 last year . Realy very good engine .Powerfull .Cruising speed 3200 rpm . Fuel around 26 l/ hour . price we payed around 16 000 EUR.