The 55/75 is probably a bit too stiff for your set-up unless you draw 29" +. Bare-shaft testing is a good way to determine what will work for your situation.
My 46# Widow shoots 30" 35/55's well with 125 grain heads (my draw is just about 28"). That said, for good flight you may want to try 1916 aluminums (w/125 gr. points, 28.5"-29" arrow). And a wood arrow in the 50-55# or even 55-60# spine range is also a very good option. Beer cans and wood will likely be easier to tune than most carbons, an advantage if new to arrow tuning.