Seeing it from Howie's side, their fan base will think nothing but a first is enough to justify taking the salary cap hit. Also the fact is there are now several recent trades where veteran starters are traded for first rounders. If he takes anything less than a first, the mystique of Howie takes a big hit.
I have consistently said that I think this is a bad move from a team building perspective, but now also feel the deal has been agreed and it will be for at least a first. The idea that the deal is already done gets bolstered by the fact that Philly just took a WR in the first. They can now say look, it took a first to get someone good enough to replace Brown, we have to get a first back.