I'd have to suggest the 6.5 Swede as well. Unfortunately, mil-surp Mausers have gotten a bit costly, so building sporting rifles on them is not as cost effective as was once the case. Also, there are a number of fine spoting rifles now available for the 6.5X55. That was not the case when I built my custom model 38. Had there been any such sporters then, I most likely would not have gone to the extra expense of building one.
You ought to give a very close look at the CZ American. It sounds like a real fine rifle, and it has the advantage of a set trigger. It's not very expensive either. I just checked their web site (
http://www.cz-usa.com/ ), and the list price is $588 and should be aavailable at dealers for less than that. It would cost a lot more than that to build one up, and the action wouldn't be quite as strong - unless you started with a 98 Mauser - which would be even more expensive to do as it would have to be rebarreled. And the CZ is already a Mauser 98 type action.
Some folks started with one of the Turkish Mausers which used to be quite cheap. Mine set me back the princely sum of $50 several years ago. (I should have bought a stack of them - just for the actions if nothing else.) I haven't priced them lately, so I don't have any idea of what they're going for now. I'm not sure about this, but I think the small ring barrel threads on the Turk will accept Swede Mauser military barrels that should be available on the parts market.
I believe Winchester is now offering the 6.5X55 in their Featherweight again as well.
Of course, you might get lucky, like MGMorden, and find an already sporterized Swede at a reasonable price.
Any way you get one, the 6.5 Swede is a delight to shoot, extremely accurate and a fine game killer.