The free agent WR crops is pretty weak, IMO. But I think there will be a draft pick allocated to a WR. Hopefully with those types of measurements. If you held a gun to my head to pick one, Hartline is 6'2" and has good size at over 200lbs. Hagen perhaps if you are looking at a depth type guy (ie not a starter)
Boldin would be a dream if he is a cap casualty.
I think a lot would have to happen before Boldin made it here. First the Ravens would be taking away Flacco's #1 weapon, which may not make much sense since they're giving him all of that money. I would venture to guess that keeping Boldin is rather high on Baltimore's to-do list at the moment.
Secondly, the NEP would have to offer him enough money that they'd lure him away from any other perspective clubs. That itself may be the least likely of all of the scenarios, and even IF they somehow did that, it would probably mean that Welker was gone or that another important position may suffer.
I hope you're right though, as Boldin would be a nice acquisition.
As far as bringing in a top round draft pick, sure, it's probably going to happen. That said, there haven't been too many WRs taken by this team in any round who have produced in their first year, as that is often viewed as a chance to learn the complicated playbook and nuances of the timing system that is extremely important when developing chemistry with Brady.
They'll have to draft someone this year regardless, but that may be with more of an eye towards the future of 2014 and beyond. I think we'd have to luck out in a big way to get the kind of production from a rookie that we'd need for next year.
And Hartline may fall into the too expensive category also, although I'm not even convinced that he's even worth it, and I'm a huge OSU fan who is quite familiar with his body of work.