I have pine face frames in my shop cabinets. They see a lot of abuse from most of my spring clamps being fastened to them. They are holding up just fine though. I haven’t enjoyed using poplar for face frames. I just can’t stand the end grain of Poplar. It absorbs paint so much more than the edge and facegrain, that it’s hard to get a consistent look (at least in my experience). Might want to consider Beech. At least here in Jacksonville, FL, the price is comparable to Poplar, and its much harder.