Looks like a new one!
Congrats!!
Check your sights secure. Did you getall three breechplugs and the extra bolt? Scope mounts like Cayugad's can be had at e-gunparts.com
http://www.e-gunparts.com/DisplayAd.asp?chrProductSKU=929060&chrSuperSKU =&MC=
S-439 front
S-452 rear
S-455 alternate rear (I'm curious about that one as to how it differs from the 452)
The Grand Slams are nice bases but offer little flexibility in ring placement. That's one reason Dave ran into trouble with that Millett Buck Silver (aside from the scope just being too long for his purposes). That Nikon Prostaff he got looks like a good choice, but I think the ideal choice would be a Leupold 2x7 - if ya got one layin' around.