The Pro 5R is sweet. The Magnum Force on PTP's website is $218. The cheapest S&B is $269. Turbo upgrades are WAY down the road. The Pro 5R is $312. May just give in Jeffrey and do it big!
They're just a cheaper option than the others for those on a budget and need something better than stock. And the 269.00 S&B's are discontinued, they redesigned them for more flow and now cost 289.00. If your going to be running big tunes and doing future performance upgrades the Magnum Force might not flow enough for you.