I have been using CodeWrite for 3 1/2 years. I like so much I have 2 copies. I was able to get one copy at a software resale shop for about $100 US vs. the $299 or so US it is. I have also bought it for an employer from Programmers Paradise. It is extremely customizable.

You also might try PFE Programmers File Editor. It is free and I have used it in production for asm and c. You can find it here:
http://www.lancs.ac.uk/people/cpaap/pfe/

Have fun.

Bobby