If it were my saw, my only larger saw and I did not have a pickup bed worth of other big saws, or D009 mount bars in most every increment made- then I would choose a 28 inch bar for that 572.
Because a 28 will cut everything a 20,18,22 or 24 is capable of cutting- but will allow cutting a 48" buck cut easier than anything smaller.
To me, the weight thing does not factor in when the saw is working- only if you carry the saw a long way between cuts, or like it to sit balanced as a shelf queen.
28" bar gives good limbing reach without as much back bending.
Having said that- my own preference for saws slightly larger capacity is for 24" standard and the next step is often 36", missing the 28-30 range. In the 70cc range I tend to stick with 24" as the maximum- but I have larger saws for larger bars.
Your choice is more governed by species cut, diameter cut and bar/chain loop availability/price in your specific area, than what we might all do, or currently do.
