When looking at Stihl or Husky saws spend the money on a pro grade saw so with Stihls its the even numbers are pro saw Husky any saw with XP is their pro line up.
Your best bet is go to a saw shop that sells Stihl or Husky to see what fits you the best don't buy a saw from a online store because you may buy a saw that doesn't fit your needs.
You really need togo to a store and physically pick up the saws some places even have demo saws with a test log you can try the saw out on.
I don't know how anybody could use Mulcoloch saws its just as bas as owning a Poulan any of those saws you buy from big box stores stay away from.
What you want is to buy a saw from a dealer in your area that knows your saw and knows who you are. Like for me when I needed parts etc for my Stihls the shop I was dealing with knew what saw I had etc. When I needed chain I told the shop manager I needed a chain for my 046 he went and got it he already knows it runs a 28" bar. It was the same when I needed a chain for my MS260 that runs a 20" bar.
The guy I was buying my Stihl stuff sold the shop and retired I used to buy stuff from him because he was the only Stihl dealer. The local rental shop became a Stihl dealer they only sold Huskys originally.
I prefer Stihl myself just because I have been using Stihl equipment for along time same with the logging contractors and fallers. This community only had a Stihl dealer for a long time then Stihl pulled the dealership when the rental shop changed hands. Stihl felt that this area of 30,000 didn't need 2 Stihl dealers so Husky moved into the rental shop it went over just as good a lead brick floats.
The logging contractors were definatly pizzed they didn't want to travel the 80km round trip to the Stihl dealer so after lots of letters from the rental shop Stihl come back. I think the first year Stihl moved back the rental shop sold 10,000 dollars worth of Stihl saws in 1 year.
Enough rambling
I hope you make the right choice for your needs once you gone with a Stihl or Husky you would wonder why you owned a no name brand saw.