Looks good. I don't have Complete Adventurer handy so I can't compare but it looks good on its own. Now, lets get on to my comments.

First, the 1st level of the PrC is pretty weak. All is allows is for casting with two weapons which is nice, but the level could use a little bit more. Something minor but still useful, just so the 1st level isn't so bland.

Next, the DR/Cold Iron is kinda useless being only 1 or 2 points. Maybe up it by a point or something. I see the flavor use and it fits, it just is quite weak. So you could probably bump it up to 2 and 3 points.