Mining with 2 5850's

[cncguitars]

Hi guys I am new to the forum and would like some advice. I am mining my 2 5850's with cgminer and getting a hash rate of 372.1kh/s on each, (Total hash of 744.3kh/s).
Is using these cards at the hash rate I am getting worth it or should I look into getting some new cards.

Any advice would be appreciated

cncguitars