Lanefan
Victoria Rules
Sunblade? Is that like a Sunsword from previous editions, 'cause if so that's a mighty powerful thing to be giving characters who can't even cast Continual Light yet...4e has this and my experience is that it works just fine. The wizard can only have one light active at a time, though, so the fighter's Sunblade is actually a better bet most of the time.

Detect Magic isn't usually a combat spell anyway; it's more an exploration thing. I'd rather force the casters to have to choose where to put their spells, but either method could work.4e uses a skill for this, which works far better than the spellcasters having to give up attacks or heals for it, in my experience. Taking an action and a skill roll is easy in the "search the room" phase, but often decidedly sub-optimal in combat.
Lanefan