Boldin. Proven stud over a rookie every time.
Sterling Sharpe, Warren Wells, Derrick Alexander, Bob Hayes, Wes Chandler, Cris Collinsworth, John Taylor, Herman Moore and Gary Clark all had big years in their late 20s before basically falling off for the rest of their careers.I'm not saying I totally disagree with you, but "proven studs" bust pretty frequently, too.
That's kind of a sloppy statement for you, Chase. Seems to me that you should define "proven stud" and "bust" and then provide some data that proves that "proven studs" "bust" pretty frequently. (Since you are the type of guy who normally backs up his claims with data.)

Also, let's be clear what is being compared here. The odds of the performance of a "proven stud" falling off sharply around age 30 or soon thereafter vs. the odds of a rookie WR "busting". Are those really similar enough? A rookie WR might not "bust" but also might not ever reach "proven stud" level... and a "proven stud" might fall off, but still be a solid performer, just not at the same elite level.Just looking at the list you provided, IMO it is debatable whether Derrick Alexander, Cris Collinsworth, and/or John Taylor were "proven studs." From a fantasy perspective, I'll suggest that at least 3 top 10 finishes at the WR position through age 29 could be used as a loose definition. (Feel free to define a better one.) That criteria fits Boldin and rules out Alexander, Collinsworth, and Taylor.Of the other 6, I know Sharpe's career ended abruptly due to injury... I don't think that really provides much predictive value. Not if any of the others had a similar injury, but it is certainly true that some of these older players did not have the advantage of modern nutrition, training, and medical care, which can extend careers and higher production. Regardless, this leaves a very small sample size of "proven studs" who "busted" soon after their late 20s.And, of course, you didn't mention any of the guys who didn't... like Rice, Harrison, Owens, Tim Brown, Carter, Bruce, Lofton, etc. My gut feeling is that it is very likely that a player like Boldin will outperform a player like Crabtree for the next 3-5 years. Of course, it's also very possible that a team would have to pay Boldin more over that period than they would have to pay Crabtree (not sure of the market for a rookie WR taken in the 5-10 range)... so that should probably also be part of this value judgement.As you can tell, I voted Boldin.