What a difference a font can make! I futzed around with Coda from Panic yesterday for a while on a project. It was enjoyable to use but I kept finding that I would return to TextMate to do anything heavy with my code. I realized after bouncing back and forth between them that what I really liked about Coda was the default font. It was smaller than what I was using on TextMate but still really, really readable. I little bit of poking around and I found that Coda ships with its own…