There are a couple of more setting-centric thoughts about magic users that didn't make it into the recent relevant post.
I envision magic users in my setting as more adventurous than their "standard" brethren. With a more restrictive spell system, with a more limited number of acquisition options, they are forced to venture into the wild places in search of spells. They are also forced to be more pragmatic and seek more mundane solutions to many of their problems. Thus, they are slightly more robust and more capable in a fight.
- They may use any one-handed weapon
- They may wear leather armor, but still may not use shields
- Their hit points are slightly better, adding +2 on the even levels, rather than +1
It seems like there was something else, but now it eludes me. Oh well, there's always another post.