I would order a Bmax in a heart beat if I could afford it. I used to have a job that would pay for the good parts. My present job hardly pays for gas, but we get by one way or another. When I rigged my boat I dont think the Bmax was available. I went with Imco's best at the time. While breaking in the motor a few teeth broke off their extreme forward gear and left me hanging.. And believe me I never applied abusive power to the drive. Well since then I have spent enough to probably buy a Bmax. But each time the drive failed it was not because of abuse, I believe it was assembly that caused the problems. Like I said I will rebuild it this time and hope I get a summer or two out of it. Other wise, I may park the boat until I can afford a Bmax or just sell it and buy that pontoon boat the wife wants.
I have seen a drive or two that will hold up to big power when used properly.. and I challenge you to test the limits of your present drives. I guess I like to fly my boat.. and i would love to have a drive that I didnt have to worry about. I baby it out of the hole.. never hammer the throttle, always ease it up to speed. I guess if you can find someone that can assemble them correctly and have had good luck with that builder..then use them by all means. I have not found that builder with out spending tons of money to find out.
I guess my suggestion is to head for XR gears, I have heard they are the strongest at this level. As for better bearings, I think there are limits as to what you can expect from them. If I were going to spend $6k/7k on a drive I would extend the home equity and buy the Bmax.. It has had some problems, but it is a strong unit and will hold up to a lot of power. I just need a couple of years of good luck to bolster the bank account and then maybe I will get a Bmax.. and be done with it.