There are a lot of opinions on what is the best charging system design but what none of them take into account is what is best for you, your boat and most importantly, your troubleshooting skills when the time comes.
Not singling out Blue Sea Systems but I'm always wary of recommendations from entities with a financial interest in your decisions. Here is a post from a few years ago that makes the points I've mentioned. You can read the entire thread by clicking on the thread title in the upper right corner. Neither of the drawings in the link were from Blue Seas but one of them was from a professional marine electrician. Guess which one.
http://www.moyermarineforum.com/foru...4&postcount=19