With the second pick, the Rams take .... Jason Smith or Eugene Monroe.
Those two tackles, Smith from Baylor and Monroe from Virginia, are the two top tackles and both will be immediate starters wherever they go. The Rams struggled with poor line play last season, which is why they have to take a left tackle with their first-round pick. They signed Jason Brown from the Ravens to play center, so now it comes time to fix the left tackle spot.
I like both Smith and Monroe, but my guess right now is that Smith might be the Rams choice. He plays tougher. The Rams need tough on that line.
As for Pace, I'm not sure how much he has left. I'm also not sure how much he loves it anymore. A team looking for a one-year fix might give him a look, but he's had some injury issues over the years.