IOE generally only lasts 2-3 weeks. You'll essentially be crediting guarantee as you'll be on reserve as soon as you are finished. I would personally choose AWAC, though the 2015 question is one worth considering.
AWAC has 50 seat RJ's, yes... but they've flown LOTS of other a/c in the last 40 years, no reason they may not change again. The biggest hinderance to the future of Air Wis isn't the CRJ-200, it's the company's inability to secure any RFP's (request for proposals). This is, in part, due to higher labor costs when competing with certain other carriers in their market.
Considering RAH's current contract struggles, which don't seem to be getting any better any time soon, and AWACs awesome contract that they worked very hard for... I would go Air Wis.