Chainsaw Repair

Hey guys.
New to the forum & 1st post.
Was in a saw shop yesterday looking for some Jonsered parts & the guy couldn't help me.
BUT (famous last words) he had a nice clean looking little 026.  Almost new 20"  (May be 22", can't remember) Oregon rollernose bar & 3/8 chisel chain.  Shop took it in for repair & it was never picked up so unknown history.  Price was $175.  Sounded fair & I've been thinking about a smaller saw since I'm getting older & the part of Alaska I'm in doesn't really call for 30" bars for firewood cutting so I grabbed it.  Was that a fair price?  Got it home & cut a couple of rounds of spruce about 16" in dia & it runs & cuts like a champ.
My main questions are what's the difference between the standard 026 & the pro (besides comp release), & any particular problems to watch for on these saws?  Couple of friends have Farm Boss'.  How does the 026 compare?  Is a 24" bar a little much for these saws or will they generally handle it OK?
Back in the late 70s-80s I spent a lot of time working in the woods & running 041s on landings & 045 etc bucking, but not familiar with the newer Stihl stuff.
Thanks

There should be some info in this 026 pro thread I was learning with and guys shared info on.  http://chainsawrepair.createaforum.com/stihl/stihl-026-pro-16/

Thanks guys.

Cut for fun, how much difference will your muffler mod (from other thread) make on an otherwise stock 026?  How large can you go on the opening safely (need backpressure right?)?  Is the carb tuning afterwords just tweeking the h/l adjusters or rejetting?  Not looking to build a comp saw, but want the best RELIABLE performance I can get for woodcutting.  Some of the guys from our church occassionaly go on trips to cut firewood for bible camps in interior Alaska that heat primarily with wood (150+ cords a year).  We go for a week & its a several hundred mile fly in trip from the nearest "big" town, so reliability is huge.  I hate having to use their very well used saws as a backup.  Cutting spruce & birch, mostly 16" & under.  Same at home but MUCH smaller quantities!

660mag, I love decals!  Already found one  :-)  Cheapest way to go fast is decals!

Stock 026 muffler covers and backs. Some are choked up with baffle and some open.

Don't have the saw sitting in front of me but I am 99% sure it is the fully adjustable carb.  Looks like I will need to pull the muffler cover when I get a chance to see what I have. 
Thanks for the pics.  I'm a visual learner  :-)