Upload & Sell: On
No disrespect meant to the posters here, but the OP mentioned 3 things. Additional focal length, a budget (the price range equivelant of the 28-135 and the 17-85), and 3rd, and only if possible, a jump in quality (assuming the full boat of build, AF, IQ etc.)
You can always (well almost always) get a better lens if you can afford more, but then every forum post becomes a general discussion about every lens canon ever made, their benefits vs 3rd party vendors, and what focal lengths constitute the best "walk around" for a crop camera ending with recommendations to get a full frame camera, the 16-35 II, the 24-70 2.8, and the 70-200mm 2.8 IS II along with the 35 1.4, 85 1.2 and 135 2.0 to round things out.
Be helpful people.