Excellent advise.Mid sized Stihl or Husky, depending on the servicing dealer closest to you. While a lot of people have a preference, it's the Ford Vs Chevy discussion and it boils down to what you like best. Since you don't know, either one will work equally well for you.
Having said that though, a few thoughts:
Going out in the woods with only one saw is foolish. You need a second saw when -not if- you get the first one stuck.
Invest in protective equipment and WEAR IT. A chainsaw that can go through a 10" hickory log in 5 seconds can cut off parts of you MUCH faster. It takes a person about .2 seconds to react on average, and in that time a sharp saw can sever a leg.
Learn how to hand sharpen your chain and KEEP IT SHARP. The chain is the heart of the cutting system and I've seen more saws abused and sold because the owner couldn't maintain the chain.
I touch up my chain each time I fuel it and it takes from 2-5 minutes depending on which saw I am using.
NEVER operate a saw when you are unduly tired or aggravated. My rule of thumb when I go out is that I go out after having eaten, I run through 2 tanks of fuel (one for each saw), and then I get another meal and a rest before doing more. Fatigue will get you hurt. It's not just the saw that can get you hurt either, falling limbs, branches snapping back, etc. I was almost disemboweled after a cant hook I was using broke the handle and I went head first over the log down an embankment. Luckily the log did not roll on top of me, and my shirt was torn and I had a long scratch on my side where the jagged edge of the handle caught me as I was going over.
Work with someone else nearby when you can, or at least let someone know when you are going out and when you should report back.