I live in Bali and for anyone that knows it, I surf at Legian Beach which is almost always fast and powerful waves. Taken from a surf article: "High tide at Legian can serve up some of the most power-packed beachbreaks in the world. Always bigger than Kuta." The whole time I've been surfing, it has generally been 4-6 foot waves, today being 6-9 foot so I think I'll be on the whitewater

I do want to say though that I feel like I'm coming along great in my surf, I've got to the point where turning the board feels quite smooth. It's not as if I'm getting beaten down and want to quit surfing, its very much the opposite. The condition of the surf spot might sound exaggerated above, as we have had some great days. Last week we had one day where all the local pros dropped their small boards for foamies, to enjoy longboarding conditions.
This post may be getting too long so I'll summarise everything:
32 years old male, 6" 1' tall, 85Kg (will be back down to 78-80kg soon, which is my normal weight). Surf 3 - 4 times a week.
Have a 9" longboard but the beach I surf at is fast and powerful waves (usually 4-6 foot). I'm hoping to get a board that really suits these waves and will last me a long time. At first I thought a long fish would be great but I may of got completely confused and have now been looking at fun boards, more particular an egg board.
How does an egg shaped board around 7"6 with 45-50l sound? I'm very lucky as I have someone close who wants to gift me a board up to £500 so I've been looking at Chris Christenson boards that are readily accessible here. Though how easy it to break something like this as a beginner? Should I look at something cheaper?
My longboard definitely won't be getting replaced out and I'll be using it as much as I can i.e. when a small day comes along or a big day, to go hit the whitewater.
I'm hoping someone can help me as I only seem to get the advice "beginners should only use a longboard or just buy a small board man, its what I learnt on."