I would stay clear of the Swede's built on pre-m98 actions (they are beautifully machined and strong and all that; but a failed case means your face and eye will be sprayed with debris. Thrust me, I have seen it happen and the shooter wasn't happy to get to know the eyedoctor really good...). Some of them are downright dangerous (example Stiga marked ones in 30-06 and 9,3x62; magazine opening extended by simply machining away material behind the locking lug, and many of them built on factory 2nds actions..).
The ones built on m98-actions are an excellent choice! FN made actions, Swedish barrels and finish.
1600/1640; this are nice rifles, well built and finished; but spares do not exist (they share close to no parts with m98 and m94/96/38).
If you can find a Hva/CG model 1900-buy it; it is a fantastic action. Smooth, and really nice! They also exists as "Viking 1900" and "Antonio Zoli 1900".
If I were to buy a 6,5x55 for hunting today I would buy what is probably the most boring rifle ever produced, a Tikka T3x. Cheap(ish), accurate out of the box, available anywhere (here in Scandinavia-I can buy milk, bread, butte, a Tikka T3 and a moderator at the local Co-Op..).
If the purpose was range use the choice would be a Sauer 200STR/SSG3000.
If one looks at how the 6,5x55 is loaded by Scandinavian target shooters today and how it perform-wow-this is a little magnum! Please do not attempt thoose loads in any old gun..