I'm in PA as well and have hunted most every corner of the state at some point and season. You can find great stuff from most sources but seldom everything you want/need, especially at the price points you may be comfortable with. I am about 80% Sitka, having started several years ago slowly switching over from countless no-name or little-known vendors.
What's your budget? This time of year you can find sales and good deals from guys who geared up for a hunting trip and are now looking to dump stuff with low miles on it. You have months to slowly acquire new items.
I started out piecing Sitka from Ebay. I've bought a few pieces from members here as well. Once I qualified for the Sitka Pro program, that made me pretty loyal. I still buy a piece here and there from other major names but I generally do not "need" anything.
I suggest getting out to try on as much stuff as possible. With some vendors, like Kuiu, you just can't. Pay attention to what guys say here, reviews, etc. Not all pretty items are suited for sitting all day or still hunting, like most of us PA guys are used to. So much stuff is attractive but when you think about it, will you really "use" it? Likely you end up with three or four early to mid season pieces and three of four late season ones.
You are going to find that good base and mid-layers play all year. Focus there. Outer wear can be more subjective but IMO, the Sitka Stratus jacket and bibs are up to 70% of my use, the Fanatic jacket when it's 35 or colder. Mix and match base and mid/insulation layers. I put in 400 or more hours a year, September to end of February so I use a wide range of items mixed across temps and methods.
If you are curious, PM me and I'll send you my gear list etc, I know I made one at some point.