I think if the question was 'Do you want to keep Boom, Allen, and Corbett?' I would of course say yes.
But if someone laid out who the Rams wouldn't be able keep if they did that I might change my mind.
Watching the Rams 2nd, 3rd, (and 4th?) string OL play over the last couple weeks makes me think the Rams have an abundance of riches in that room. Assuming Whit returns the Rams could let Allen or Corbett go and retain 4 of their 5 starters. To me that's really not a huge turnover all things considered. And in that scenario Boom would be the swing tackle. I suspect someone will offer him starter money, which ought to price him out of the Rams' plans.
But even with Boom and either Allen or Corbett gone the Rams would have either Allen or Corbett plus Whit, Edwards, Havs, Anchrum, Shelton, Jackson, Evans, Demby, Pircher, Kolone, and Brewer. That's 12 OL plus whoever they draft and sign as uDFA heading into camp.
And they would have that FA money to spend on position groups where they have less depth.
AlbaNY_Ram