Smith is supposedly getting the tag if the Bucs can't sign him to a long term deal. Williams is a RT, I wouldn't be oppose to signing him, although he is coming off and injury so you have to be aware of that.
Also kind of a little worried about Brown. He wants to be(and probably will be) the highest paid OT in football. The talent level with him is immense, no question about it. But Dante Scarnecchia had an interesting quote about Brown, at least according to the AM guys on 610(I can't find it anywhere), it was something like "It was an interesting process trying to get Brown to adjust to the Patriots level of practice and preparation" I heard this after I saw some Bay are reporters tweets about how the players and the coaches with the 49ers were less than enthused with Browns work ethic.
I've since read a quotes from Scarnecchia saying how hard Brown has worked to get to where he is, so if there was an adjustment to get him in the right mindset you just hope he keeps that same mindset after getting paid. With that being said I'd still go after him, just something to be aware of
Sometimes it takes a guy like Scarnecchia to show a classic underachiever like Brown what kind of work it takes to reach his potential. That's why guys like Scarnecchia are GOAT's.
If the Texans sign Brown and he reverts back to being avg then that will fall directly on Devlin and BOB.