Originally posted by max_pyne what is your definition of better?
I would agree with this question.
I purchased the 18-135 mainly to cover 20-60 mm with a WR lens at an affordable price. I think my copy has very good optical qualities in that range. As others in the forum have mentioned, the lens is robust, has a quick, postitive focus, and it's relatively compact for its FL range.
"Better" might mean faster apertures, absolute sharpness across the frame, smaller, lighter, or all of these. But a 35 mm lens or a 43 are not wide angles, and 50 mm isn't a telephoto. It's the usual trade off - several excellent single focal length lenses vs a single zoom that has slightly less appeal optically.
You might find the 43 Ltd to be too "limited." as a single-lens solution. I would recommend re-considering your 18-135 (i.e., what don't you like about it?), or consider one of the zooms mentioned here.
Edit: OP posted some anwers in Post #7. Perhaps ignore my comment on the 18-135.
- Craig