Deep down I think I was leaning towards the 22lr anyway, even before I posted this thread. I know about the price differences (ouch) between the 2 cals. I already have a Thompson Centre R55 Benchrest and while it is considered to be one of the most accurate semi 22's out there, I know that it's not the same as a bolt gun.
May be late to the party. YOu have all you need. Not many bolts will out shoot that TC r55. been there done that. use it, just watch for the chamber gouging, otherwise its as accurate as 22 as you will find for under $1500, may be under 2K