rmarsh, Carew is an excellent choice. No super-high PA seasons I can saddle you with. No really terrible seasons either (he came into the league and hit .292, and left the league after hitting .280). Really came down to 2 choices...1968 was his weakest offensive season, but that would still give you a near-fulltime 2B with a normalized .291 average.
So I am going for 1970...his stats are awesome, but in just 204 PA, which will cost you $2M, so you'll still have to spend money on an infielder. And we'll see how much damage Carew's D/D- at 2B (or D-/D- at 1B) can do.