While I still believe WHIP must be the #1 factor in choosing pitchers, I have started to pay more attention to ERA, especially among those pitchers who always seem tp put men on and get out of jams. I had good luck with a bad Sisk card, went ahead and drafted him again, and now seem to have a genuine good Sisk card. I've also used Sammy Stewart (albeit limited duty), and he seems to be effective (at present).
What this tells me (possibly), is that SOME high-WHIP guys can be quite effective. Sisk is going to be around 1.40 most years, BUT it's all singles and walks. Thus, it takes a lot to get around the basepaths. Granted, he needs to come in bases empty to be extremely effective, but, in some ways, he like a Quiz with the walks and singles exchanged. Sammy Stewart is similar, as is Jim Kern (though Kern has the K's).
Bottom line: I no longer automatically overlook pitchers with 1.40 and above WHIPS. I check out the ERA's (as well as the cards themselves). The cards seem to reflect the stingy ERAs (though, to be honest, a pitcher's ERA could be the result of good pen, ballpark, as well).