No way you have room for all of that unless you shove it in the bladder compartment too. But that takes up water room and gets uncomfortable on your back. In my Lobo, without using the bladder pocket, I have room for the following:

2 tubes
CO2 cart
Multitool
Cell phone
Maybe a couple Gu's or a Clif bar

That's about packed to the max. You'd be surprized how little 150 cubic inches is. I'd reccommend something in the 500 cu in range. You might be able to find an expandable pack, that way it'll be small enough for racing and big enough when you need to carry everything.