I'm preparing to repower in the Fall, and I'm looking at both the Beta and Yanmar ....
Beta 75 Link .... Beta 75hp ( V3600 ) Marine Diesel engines
(BETA Marine West used to have pricing up, but I couldn't find it tonight)
Yanmar 75 Link Yanmar Diesel Engines
( BTW - registering doesn't give you a better price)
It's my understanding that the online pricing is more than actual sale price.
I'm looking for something in the 50 HP range, so my options are slightly different.
Personally, I think I'm going to wind up with a naturally aspirated Yanmar, I really like the Beta, but in my case length is critical, and the BETA is about 4 inches longer..... and I need that 4 Inches.
I tend to shy away from Turbo Chargers, it's just an added bit that is extremely expensive, and tends to fail. ( at least I've been reading some stories about the Yanmar Turbo Charger being a major issue )
Hope you find something in all this you can use.