Whitetails&Muskies and 2droptines, what arrows are you guys flinging?

I' m shooting an ACC 3/49, and am torn between deciding to go with the 300 or 400 series. Tech info states 300 for 399 grains and down, 400 for all weights above 400 grains, but when I called Bodoodle a while back, they recommended the 400 over the 300 at any arrow weight.

I' m concerned the 400 may give me more fletch contact issues over the 3 prong 300, but may shoot a heavier arrow in the future, and don' t want to have to buy another rest just to change...