I too am a 6.5 slappy so that is my vote for caliber. I will probably own a Roberts eventually, but only because I already have a 6.5.

As far as what rifle, I have expensive taste but limited funds. I would love to have a NULA at some point, but for now, I did a trade on the campfire for a Tikka in 6.5x55 and I gotta say, I love it. I still want the NULA, but the Tikka really does everything you need it to do. Good trigger, shoots great, ect... and for the price, I'm not afraid to beat it up.