Like others have said, the wand is going to be better. Heres why (as far as we know):
Each item slot counts contributes 1/16 of the stats in your template. So putting something in each slot gets you a full 100% of your template. Two-handed weapons count as 2 slots, and so contribute 2/16. It seems like wands are incorrectly categorized as 2hers. That means the wand contributes 2/16 AND you get equip an offhand to add 1/16 to the rest of your gear for a total of 17/16. So using a wand gives you ~6% extra stats.
Since ilvl contributes so little at 0.1% stats per ilvl above 24, you would need a weapon that raises your average equipped ilvl by 63 to make it better than a wand. That would mean a weapon 1h weapon with item level over 1000 or a staff with item level in the 500s.
So in short, ANY wand is going to beat any ilvl improvement. Grab any wand from the AH for now, and look at getting one of the ones that Donor mentioned at ilvl 25. And then hope to get one from a BG crate...I think they drop in ilvl 27 from there?
