temp will vary depending on the material, color, and the hotend... the stock SD4 hotend ran much cooler "reported" temps than the E3D does
While not an absolute necessity, a fan is quite useful for printing PLA. It does depend a little on what you are printing, too... fine details and overhangs definitely benefit from a fan - larger, less detailed things with few or very shallow overhangs, it is not a big deal
SD4 #1 & #2 - Lawsy carriages, E3D v6, Rumba controller board, mirror bed plate, X motor fan, upgraded PSU & Mica bed heater
SD4 #3 - in the works ~ Folgertech FT-5, rev 1
Printit Industries Beta Tester - Horizon H1