From everything I have read and people I have talked to about the s35, for the money , it's a worthy upgrade for the rear. By the time you buy a used d44, go through it to make sure all the components are good, regear if needed and add an ARB you're still in the $1300-$1400 range or more. The s35 kit from Superior will run around $1200 with an ARB included. Truss a 35? personally I see no need unless you are a skinny pedal to the floor all the time wheeler. With the 35 you'll keep the weight down. The smaller pumpkin gives a bit more clearance. The performance difference between the stock d44 and the s35 will be minimal behind a 2.5l. 33's will be no trouble at all for the s35, 35's are as big as I would go on any 2.5l The Super 35 upgrade is one that I will be doing in the near future. BTW this is all based on setting up the kit yourself or going through the d44 yourself. Farm out the work and the price jumps big time. IMHO