I think he'll be right around your projections assuming health and all. He took a great step in the right direction last year. This says it all:
2004: 141/58 in 545 ABs
2005: 54/35 in 333 ABs. That would be approx. 89/58 in 549 ABs.
Assuming extrapolation, 52 less K's with the same amount of walks is a big reason for the improvement last year and it should continue. Despite his HR numbers dropping last year (9 as opposed to 22 the year before), his SLG actually rose from .426 to .456. I think if he can stay healthy and get into a good rhythm next year in Oakland's improved offense, he should match your projections, if not exceed them slightly. Although as Ryn said, I wouldn't count on any significant amount of SBs.