You will get the most out of your ion with a Halob / Reloader B, as they feed more than fast enough to feed the stock boards 17bps, and with any other board.
Apparently zboarded eggs can keep up with 15bps ramp, but they are not as good as halos.
You main choices, if you can afford it, is a Reloader B, Halo B or VLocity for max performance.