Upload & Sell: Off
I've thought on this lens a lot, the new non-L IS primes recently released as well. I've a 24-85 that's worked out great for 10 plus years, and for my shooting when buying a zoom I've always made sure they 'overlapped' each other as there are usually some negatives at the extremes.
With a sharp 17-40L and 70-200 f4L IS in my kit, experience with the 24-85, I'll upgrade to the 24-105...for the overlap, comfort that will provide. I've also seen the images from many here on FM and worked with images from the 24-105...it just fits better with my style of shooting.
Plus I've no need for it's 'macro' abilities, a 100L IS is in my kit...and I rarely leave home without it