Do you really need noise abatement devices where you fly. If not save the money and lose the weight of the cannisters.

One battery each for igniton and receiver works just fine. 1,000mAh battery, 2,200mAh rx. That's presuming a Lithion Ion. You can go with a 1,650 nimh on rx but have to charge during the course of a day with more than 3 flights or so. Using a nicad, you can go with 800mAh for the ignition. It comes down to what you want to spend. I prefer the lithions.

Don't use a Wye, match through the tx or an accessory device, Matchbox, Equalizer, etc.

Since price will likely be an object, Hitec 5925 or 5945 would work just fine.