Grab LaRoche for your bench in the late rounds. Maybe not this year, but next year he could be a solid go to guy if your starting 1B goes out, and the next few years he should do pretty well. If given the starting job, I'd project him for the next few years at:
.320, 22 HR's, 88 RBI
(Which is not bad at all) He hits a lot of doubles, and that should translate into more power in the next few years.