ORIGINAL: charlie brown
I would take that .223 Remington 700 any day of the week if I knew it shot good, and the price was right. Find out which load it shoots good now, buy the rifle, and forget about things. If you buy the Weatherby, you don't know if it will shoot worth beans, and it will take some time and money to figure that out.
Those weatherby vangards have very good out of the box accuracy, a friend has one in 30-06 and with federal premium vital shok 150 grain sierra gameking BTSP's he was shooting dime size groups at 100 yards.
I never really gave those vangards much thought, but after checking my friends rifle out they are made very well and the accuracy is very impressive. I am half tempted to buy one too.