Prospects are all the rage, but if LaPorta and Adam LaRoche are on the wire, you need to pick them up, although I'm thinking it's Andy LaRoche (which I will pass on for now).
LaPorta appears poised to make some noise this year. A much improved batting eye, and some serious lift on the ball (54% flyball rate) increase the chances of a legitimate breakout. You never know what a rookie will give you, but LaPorta's been in the league a few years now and showing signs of figuring out major league pitching.
However if you do choose to go the prospect route, think about picking up San Diego's Anthony Rizzo.
Keeper League:
F) N.Backstrom, E.Malkin, V.Lecavalier, P.Mueller, A.Mcdonald, B.Boyes, A.Hemsky, S.Horcoff, K.Turris, D.Jeffrey, M.Perreault, C.O'Reilly, S.Upshall, M.Erat, S.Gagne, D.Legwand D) S.Souray, M.Streit, A.Babchuk, T.Gilbert, I.Cole, J.Hillen, M.Methot G) B.Elliott, S.Varlamov, C.Ward, J.Reimer P) N.Kadri, E.Kuznetsov, S.Shirokov, V.Tarasenko, J.Blum, OEL, J.Moore, O.Pavelec