Yeah picking the caliber can be the most frustrating and fun part of a build. You a little of this... without sacrificing that... but your really want this!!!
You can see how this becomes and addiction. My cousin has changed his mind about caliber about 15 times in the last two months trying to put together his next rifle. He'll text me, "I have chosen my caliber, and you can't change my mind.
" Well you can see where this is going. If you have a year to wait on your build, take your time and do plenty of research. There are a ton of resources out there to look at. Start with this sight (which you have already done), then go to 6mmbr.com. They have some really good articles there. They can be a little hard to find, but they are there. Going to shootingtimes.com and they have good articles there. Have fun, your head should hurt by the end of the month!!!
"Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it.  But small is the gate and narrow the road that leads to life, and only a few find it.
If you find your self in a fair fight, your tactics suck!- Marine 1st Sergeant Jim Ryfinger
Friends don't let friends develop canonitis!
arguing over the internet is like the special Olympics....even if you win, you are still...special!