Sitka or First Lite both make quality gear. Which camo pattern you choose is purely your preference - the animals don't care one way or the other which pattern you're wearing. Though as a trained and practicing visual designer I have to say patterns like ASAT and Predator do a far superior job of breaking up human shapes than other patterns.... but then again plenty of critters are killed while wearing realtree Xtra too...
I am a scentlok freak though, and if you browse through the scent control section you'll see where I stand on the subject.
If we exclude activated carbon from the discussion I would the quality of gear (based on what i've tried on and seen) in this order: First Lite, Sitka, and Scentlok
The first lite stuff is really, really nice IMO. Feature rich, comfortable, and considered for hunters. Sitka is too, but you're buying into their 'systems' which is just a fancy way of saying layering. If you like being marketed too Sitka is probably your brand.
Scentlok is 3rd only because the fit and finish of their products are slightly behind First Lite and Sitka. While their garments are still very high quality hunting clothes, they just don't quite have the same level of polish as the other brands. For example some of the jackets and pants have odd sizing, etc.
Another thing to consider First Lite and Sitka hold their value extremely well. If you are not pleased you can easily resell it on classifieds without taking much of a loss.
That being said... if the public land is as pressured as you say my vote would be for scentlok. You're gonna need every advantage you can get over other hunters (and the pressured deer there). Good luck!