Also, firewood, or clearing a defensible space for those in danger of forest fires. Clearing storm debris and blow down can be very dangerous depending on how bent and twisted the branches are. Picked up a 572XP in case I need to do a lot of cutting, or have an emergency when I absolutely need to get through something that is blown down. On the small end is an Echo CS-310 which is great for little jobs, as well as having a bunch of saws in between those two in cc/HP size.
Not sure what you mean by "heavy" bars? Do you mean standard solid (as in not lightweight) bars, or a longer/bigger bar? I am about to start messing with a GB 'pro top,' which seems like a good value for a basic bar. Seems like one of the biggest issues with bars is how long the tips last, and how consistent they are. Sugihara and Tsumura make nice bars but their tips are a total crap shoot and regularly blow out. The GB tips seem really nice, but I'll have see how mine holds up. I mostly use full chisel, but having semi-chisel for stuff that's dry hardened or dirty is a really good idea.