I might be on board with the premise of the original post if I thought that there was an Andrew Luck type QB in this year's draft.
From what I've seen, there isn't.
Bridgewater (who, absent a trade up, will be gone before the Rams pick), has nice skills and is putting up great numbers against mediocre competition. I don't see exceptional skills, though, that make me think "sure thing" with him.
Hundley has the opposite problem. He often plays in situations in which his offense (particularly his banged up OL) is overmatched. As a result, his numbers have been inconsistent. Again, a lot to like there, but not enough to bet the farm.
Beyond those two, every QB in the draft has a major question mark (or several). So, in my mind, the Rams need a better #2, and should be able to get one in the draft, but are unlikely to draft someone who could challenge Sam in the short run.
When you do that...
1) Of the 12 times NFC quarterbacks have been elected to the Pro Bowl since Sam has been in the league, only three times were quarterbacks elected with efficiency numbers equal to or lower than Sam's this year. One of them was Drew Brees, who was voted to his fifth Pro Bowl in 2010 with a QB rating of 90.9. Did reputation and previous performances play a factor? Another was Cam Newton, who had a QB rating of 84.5 but also brought huge rushing numbers to the table.
2) While Sam ranks 5th out of 8 when you compare his numbers to those of previous Pro Bowl quarterbacks this season, he ranks 10th of 13 when you compare them to the years when they made those Pro Bowls. Not quite as good. But it's worth noting that Sam's efficiency number this season (in limited playing time) is within 10 points of the five guys ranked ahead of him. So it's not like he's very far off from the types of performances that warranted fan recognition in the recent past. For instance, Matt Ryan made the Pro Bowl in 2010 with a QB rating of 91, Brees made it in 2012 with a 96.3, and Manning made it in 2011 with a 92.9. This season, Sam wasn't far off from those numbers, which is very encouraging, especially when you consider there were still some sizable obstacles that hindered the Rams' offense this year.
Note: One thing that's interesting about 2010 is that the NFC passers weren't particularly impressive. Aaron Rodgers boasted a 101.2 QB rating that led the conference but was snubbed from the Pro Bowl. Vick made it with a 100.2, but Freeman was snubbed with a 95.9 rating. The next highest rating was Ryan's 91.0 and Brees' 90.9. Of the Top 15 most efficient passers in 2010, only six came from the NFC. Sorry, tangent...
Anyways, it's a shame we won't get to find out if Bradford could have sustained his early season efficiency over the course of the entire year. Of course, since there are currently eight NFC QBs with better efficiency ratings right now, Sam probably wasn't destined for Pro Bowl glory this season. But as has been discussed in other threads, he was definitely on the upswing.