The 6.5-06 isn't a terrible choice, nor the 264 win mag. I will say in confidence that the 6.5-284 will be more enjoyable for you. Lapua makes brass for it for one, so no need to get into case forming. Also, it's abundant at the moment and it's a shorter case, so in theory should be more inherently accurate and efficient. You'll also be able to pick up a set of redding comp dies for the 6.5-284 for about $180. Pm if you want to know where to get em.