Frankly, I'm not sure I agree w/ that (.350 AVG w/ .400 OBP > .250 AVG w/ .400 OBP; assuming same SLG, etc). It's more valuable while it's occuring, but I think it's more likely that a guy who is hitting .250 will be able to sustain that .400 OBP for a number of years. It's a rare hitter that consistently hits .350. More likely they're having a great year, but will fall back to the .280-.320 AVG range, and thus their OBP will drop to .350-.360. Obviously there's a lot about these hypothetical hitters that aren't part of your hypo, but I'm just saying it's not a given that the .350/.400 guy is better than the .250/.400. My basic point: I like to see guys w/ a significant difference b/t OBP and AVG - otherwise their OBP is so tied to getting hits, which are more influenced by luck than walks, that it's unlikely they'll consistently put up that .400 OBP.