Well now i have to eat crow because Asham scored last night...
Asham in his prime was both a better goal scorer and a better skater than Boyle. But in three full seasons at the NHL level Boyle's averaging 12 goals (his 21 goal campaign should offset his 4 goals the season prior). He's probably going to be a 25-30 point player for the foreseeable future.
Asham CAN produce at these levels and has in the past, but until last night I hadn't seen anything particularly stellar about his play. He's been a nonfactor, and his staged fights have brought nothing to the table. With our penalty kill still shaky, I think Boyle's biggest asset (his penalty killing) is worth icing him over a 34 year old fourth liner who only plays at even strength.
At least that was my thinking until last night. The fourth line looked great as a unit and Asham buried one when he had the chance, which is more than Boyle's done with the puck all season. I'll gladly eat crow if the Rangers keep winning.