Boeing ... welcome to the Dark Side! How to go about it? Like this:

Motors - problem with motors is that there is no standard rating unlike GP engines, so you can use a motorcalc software or the recommended set up or info from others in forums
ESC - based on cell count and amp draw, anything more than 3 cell needs separate power supply for the RX but the Turnigy Plush 60A and 80A does not need the external power suply, its built in to handle the RX. If you are properly propped you want the following power to weight ratio as a baseline guide:

Easy flying: 75W/lb - 125W/lb
Sport flying: 125W/lb - 150W/lb
3D flying: 150W/lb - 200W/lb

Batt - cell count to suit the motor and prop, capacity depends on amp draw. Keep withing the 80% rule, means if the batt can handle 100A discharge use it in a system that draws 80A max. Its a healthy guide.

Prop - use the size that matches the motor and number of cells used, usually we use 8"-10" pitch props for flying unless its 3D then for smaller planes as low as 5.5" or 6". Diameter is larger than what you get on GP engines because generally we run on lower RPMs. My 40 sized planes are running 13"-15" props if clearance permits.

To make it easy for you, let us know what plane you are looking into and then we can all suggest something. Bloated batts? Possibly its been over discharge, in terms of amps or voltage (dropped below maybe 2.9V per cell).