IMO get the needle/nozzle set for the Renegade Rage, and convert the Krome instead. The Krome is the "bells and whistles" model of the Renegade line, so the parts are cross-compatible.
The 20/20 is designed to be a high-end fine detail specialist, while the Krome is meant to be a more of a jack-of-all-trades workhorse model. Seems counter intuitive IMO to make the 20/20 your broad spray gun and the Krome your detail gun.
According to Badger's website, the Rage's needle/nozzle set's spray pattern diameter tops at 1&1/2" while the 20/20's largest needle/nozzle tops at 1&1/4", so you'll get better broad coverage with a Rage-chambered Krome. The Krome's color cup is also much larger the 20/20s, and that'll be an important consideration. Seems to me that the 20/20s color cup would be cripplingly small for that sort of spraying.
Renegade parts are around 1/3 the cost of 20/20 parts, so handier for your budget as well.