ask me about fantasy baseball v.2007

[NT!]

Now that the season is getting ready to start, a general question: how often do you guys sit a superior player due to bad matchups / bad splits in favor of his backup? General thoughts on lineup tweaking?

A specific opening day question. Giambi (vs. Kazmir) at 1B. Start him anyway or play Helms (Smoltz)? Is there a good site for quickly looking up a player's career numbers vs. a certain pitcher?

Thanks