Spivey will be a solid player, neither star nor scrub. An average of .300 sounds about right, and he may stay on his runs pace, but look for less rbi's down the line.
Julio is a bit of a mystery at the moment. At the moment, he looks like the O's best closer option, but Willis Roberts isn't out of the running yet. A sloppy performance or two by Julio, and he could well be back in set-up duty. Also, the possibility of a trade sometime this season, with either Julio being dealt away or another closer being brought in, isn't off the board yet either. I like what he's shown so far, and he could be good for you this season, but don't put all your eggs in his basket.