OK, but is 117 really that impressive? For a corner outfielder? And his high water mark of 141 doesn't crack the Top 10 for any of the last 25 years. By contrast, Nick Swisher is 118 for his career. He may not have Upton's (mythical) upside, but he wouldn't cost any of our best prospects. I am not advocating the Sox sign him, merely pointing out that equal production is likely available much more cheaply. And I agree that draining the farm would be the right move for the right player, I just don't believe Upton is that guy anymore, if he ever was.
I think a 117 OPS+ is pretty impressive for a guy with over 3,000 PA through his age 24 season. This includes stats from the time Upton cracked the bigs as a teenager and began a regular while just 20 years old. Just looking at his age 21-24 seasons, Upton's OPS+ jumps to 122. And it's probably reasonable to believe that his peak will come later than an age at which many guys are still in the minors, which means those numbers could be due to rise.
Swisher had put up 1 season worth of plate appearances (593) with a 102 OPS+ by the same point in his career. Since then, he has put up a 120 OPS+. I don't think they're remotely the same player. A young 20s Justin Upton may have put up the same production over a prime Swisher, but comparing an over-30 Swisher to a 25-year-old Upton going forward doesn't look favorable.
I think it's easy to overlook Upton because he's seemingly been around forever and still will only be 25 next season. For reference, last year in Upton's 5th full season, he was the same age as when Matt Holliday debuted.
I'm not advocating trading Bogaerts and completely emptying the system, but I think I'd listen on pretty any other players to a degree. Right now the Red Sox more than any time in the last decade need to be building around players that can help now but more importantly also help in a few years. There aren't going to be many better options than Justin Upton who is young, coming into his prime, and not exorbitantly expensive salary wise. As long as he isn't ridiculously expensive in trade chips, I'd want him in Boston.