What type of snowboard to get?

I just finished my second year of snowboarding and going onto the 3rd. I've rented boards all the time and never owned my own board. I realized that I like shorter and lighter weight boards. I'm 5'8" and I weigh 155. I like the 151 lengths which suits me best. I just am caught up about what kind of board I want. I plan to learn tricks on the rails and do park on the upcoming season but I also like to shred the mountain on the intermediate slopes. I don't like black diamonds, I don't like going that fast but I like the speed on the intermediates. Which board would be best? I like a lot of flex and less stiffness. I wouldn't mind a guys board but I know those are usually heavier. I was thinking of the never summer infinity but I hear they are on the heavier side. Any suggestions on a board for me?