I agree with much of what moe said above, but I think I would go with HS pitcher #1 over the batter. I don't know what the trade market is like in your world, but in my world that pitcher could command a couple prospects the caliber of that 3B kid. I'd take a perennial Cy Young contender over a perennial MVP candidate every time.
HOWEVER, for ordering these prospects, I'd then put the college batter above both the college pitcher and HS pitcher #2, for the following:
College SP has lower makeup/health than I would be comfortable betting on. The guy's 'stuff' and character suggest he could anchor your rotation and stay with your team his whole career, provided he stays off the DL. I'd rather have the much more solid bet in the 3B kid.
HS pitcher #2 has a couple key unrealistic projections, starting with the DUR. Starting at 25, his DUR ceiling is 28 or 29, definitely not 36. His projected STA has the same trouble. Starting at 57, I'd expect him to hit maybe 70, not mid-80s. There's no reason to doubt his 'stuff,' since those projections look realistic, but he won't be an inning eater. And besides, you have better college scouting, so this kid's projections aren't as confident as the 3B's anyway.