RE: arrow speed and distance
It would help if we knew what your draw length is and what length arrow you shoot, but just from looking at the chart and making a couple of assumptions:
If you drop down to 100 grain heads you' ll be right on the top edge of the 3555 spine range, unless your arrows are less than 27" long. I' d say you' ll need to bump up to 5575, especially if you' re shooting a single cam or hard double cam bow. If you stick with the 125 grainers, you' ll most definitely need to go 5575.
Figuring for a 28" arrow, 125 gn heads and 4" vanes, your 2213' s weigh somewhere in the neighborhood of 475 gns. A 5575 set up the same will weigh around 390. You' d pick up some 18-19 fps, but that won' t really give you any more distance to speak of. It might flatten your 30 yard trajectory a quarter to a half inch.
But you' d get a lot tougher arrow!