Romo will have enough years in him to counter RGIII... I never look further than 4 years, becasue too much changes to quickly... so i call the Romo for Rg3 a wash at best, with better short term value to Romo...
Then It is brown vs ls lynch... Lynch is a stud right now, but clearly wont have much time... John Brown is right now the number 3 WR in arizona, and i dont see Brown ever jumping floyd... so at best he will be the number 2 in the future... and in the short term, Arizona has a below average qb and a below average passing game....
So I like the lynch side much better, just because i dont see the future value to be enough to outweigh the present value...
I don't think any of these players are worthy keepers for the future. Therefore, I would look at the present. In the present, it's not even close. Lynch and Romo.
I'd do it. Brown won't ever be much more than a solid fantasy wr. Cousins and RG3 are good, but Romo is good as well. You can also find good young QBs everywhere. I'd do it if you're gunning for the title this year. If you're rebuilding, this trade really just sets you back.