Upload & Sell: Off
Thank you all for the replies and advice. Much appreciated. I guess I didn't realize that the 70-300 non-L was such a tiny jump up, and that I really needed to get an L to see a difference. I wasn't prepared to begin to think about spending that much on a lens at this point. However, after a day of letting it sink in, I see the value in it, especially since L's retain their value so well.
At this point I'm leaning towards getting a Tammy 17-50 and the 70-300L. I cannot remotely afford the 15-85 and 70-300L, so I'll have to forego that 20mm gap, which hopefully shouldn't be too hard to overcome by walking forward or backwards a few feet. I'll have to figure out if I can squeeze out the 70-300L, it really seems like a great lens. I also considered the 100-400mm, as my wildlife shots could use that extra 100mm sometimes, but I suppose I can always get a 1.4 or 2x TC to get there, as I can't really have a setup without 50mm-100mm.