Kit lens upgrade

I recently bought a Sony A-58 complete with the standard kit lens, 18-55, It was so cheap I couldn't resist it, only 5,000 actuations as well. However, it takes great Jpegs but I would like to up grade the kit lens to some thing better with out spending a fortune, Slightly longer would be OK , but not too long.
Suggestion's would be great, it doesn't have to be a Sony Lens, I would even consider a Konica/Minolta Etc.
Suggestion's would be great, it doesn't have to be a Sony Lens, I would even consider a Konica/Minolta Etc.