David, Bix 2 needs 1 x 2200mAh 3S LiPo. I would recommend at least 25C rating & the higher the better. C rating does not significantly affect size or weight whereas if you increase the mAh rating say from 2200 to 3000 the battery is significantly larger & heavier.
I find the H K Rhino brand batteries are far less likely to puff than their Turnigy (Blue) batteries and only slightly dearer.
3 batteries is a good number to start with as each will give you around 15 minutes of flight time & you can always recharge them at the field (from your car battery) if needed.
As for a receiver to suit your radio a Taranis X8R (if you can get one) or the Radiomaster R168 if you want to use one of my stabilisers, if using a newer SBus stabiliser then the RadioMaster R161 will be just fine.