dcfroe-
If you ride mainly trail, then the Keweenaw Parka is for you. It has the added layer of insulation to it that makes it a warm jacket, much like other riding gear out there with insulation to it, only it has Gortex in it, so you will stay dry, but your perspiration will be able to escape and keep you dry from your own bodily moisture too.
You will need at least one layer underneath the jacket as well, and it really has to be something synthetic like polyproplene. If you get any jacket from Klim and want to wear a cotton t-shirt or a cotton t and then a cotton sweatshirt, then you may as well save your money and get any brand of riding gear.
There really is a method to using a higher end gear like Klim. You need to have no moisture attracting fabric on you at all, that basically means no cotton at all. It really does not matter what kind/brand of base layer you use, as long as it is free of cotton (not even a small percentage allowed). I have used base layer stuff from Walmart and it worked well. Just make sure it is 100% synthetic to allow your sweat to pass through and not get absorbed. Same thing goes with any mid layer. I use a fleece jacket and sometimes a fleece crew neck sweatshirt and the fleece jacket if it is really cold, then add the outer layer.
The outer layers like the Togwotee, Valdez and Tomahawk are all just a shell, which means it will keep you dry from the outside and also protect you from the wind, while allowing your sweat to escape, but does not offer much thermal protection.
So my reccommendation to you would be the Keweenaw outer layer, then a mid layer of fleece and a base layer of polyproplene.
I will admit that the price of Klim is more than other gear makers, but unless you like to get a new jacket ever year or two (for any reason), the Klim stuff will most likely last you for a decade or more of riding, which makes it less expensive in the long run. I know I am on year 7 for a pair of bibs and they are like the day I got them. I know someone that is on season 15 with his Klim bibs and while they look quite dingy, he says they still work as good as they day he got them and is why he keeps using them. So you are paying more, but getting much better performance (rode with guys this weekend and was the only one not overheating) and much longer durability.
Dave-B-
The Revolt Jersey is not really a base layer. It is more of a jersey to be worn over a base layer. I use my Revolt a lot while riding an ATV when temps are not real hot, but I also wear a shirt underneath it. I suppose you could use it as a base layer, but it will not be as comfortable against your skin as the Aggressor and also not as warm. If you are looking for a true base layer, that would be the Aggressor.
-John