I'd go to ebay and buy my base layers there. A whopping $8 for a polyester spandex light base layer tops. $11 for cold gear weight stuff. Those are delivered prices to the US. Canadian might be a bit more but, then again, there may be Canadian sellers as well. I own a pile of dri fit and sweat wicking clothes for daily use. These are the same thing as some of them without the Nike and name brand logo. I you want merino, sounds like you got it. I prefer synthetics when in wet environments.
While you are there, buy a gen III ecwcs level 6 rain suit. Lightweight, quite when wet, with plenty of ventilation if needed. A whole used suit will run you $50-$75 bucks, compress to the size of a softball, block the wind and water like a wall, are extremely light, and are extremely durable. It is GOOD stuff. This will compress to go in a pack small when you don't need it. Next, I'd buy a 100 gram primaloft liner jacket and, a primaloft vest. Climashield works great too but is a bit more bulky. Point is, they are WARM, lightweight, and very packable. And both dry very quickly. Pants are a personal thing. In the temps you described, I'd get a pair of Microtex or polyester pants and, layer with base layers and rain shell as I needed.
This stuff total will run you about $200, depending on your wearing size and, be everything you'll pay a lot more for with the logo brands. There is only so much you can do with the same materials. So, you don't have to have the name brand stuff to perform the exact same. Buy what you want but, if fiances are an issue, you can be just as comfortable and, just as efficient without spending three house payments to do so. God Bless men