I'm a Kovacs fan, and a Richard Morgan fan. The two Kovacs books are both great, but wait until you read Market Forces. It's brilliant, easily the best book I've read this young century.
If you'd like to read more about Richard, you can read my interview with him over at Science Fiction Weekly: http://www.scifi.com/sfw/issue373/interview.html.
Also, if you want a similar author to look for, try Spin State by Chris Moriarty. I think if you like the Kovacs books you'd like this too.