cheap alternative for 24-105 4L IS USM

Hello

I am think of 24-105 4L IS USM but is there not a cheaper but worth alternative for this lens.
My main course are about focal range, focus speed and handling.
I have look and found these lensen

• EF-s 18-135 IS 299 euro

• Canon EF-S 17-85mm f/4-5.6 IS USM 329 euro

• Canon EF 28-135mm f/3.5-5.6 IS USM 349 euro

• Canon EF-S 15-85mm f/3.5-5.6 IS USM 569 euro(with this one I am more in favor of 24-105L because of price)

Or should I just save up for the Canon EF 24-105mm f/4.0 L IS USM.

Please give your thougth.

BTW: I own 18-55 IS and 50 1.8