I think Smart is headed for a better career than Noel. Too much leadership to give up, and eventual 2-way impact. Or, if giving him up, wait a bit and get something much better.
If chasing a big, I'd rather trade him out west for a decent 2-way big and good looking future pick, or a young big with good potential who won't need to be resigned next year (WCS?), plus and minus whatever needed.
In any case, I think the return for Smart will jump a lot during or after this upcoming season, and so patience is best.