I have both 8x57 and 6.5x55 rifles.
I prefer the 6.5 for recreational shooting. Less recoil, and if you reload, there is a much greater selection of bullets available for the 6.5.
Take your time and look around a bit, and you should be able to find a M96 or m38 in really good shape. The fact that the Swedes were never technically at war and seemed to be very particular in the maintenance of their rifles shows in the quality and close tolerances of the Swedish rifles.
I do have a VZ24 that I used as the basis of a 257 Ackley improved custom. The 98 action, and the VZ24's in particular were very popular for custom builds.
The action is stronger, many people prefer the #### on opening of the 98, although you can get conversions for the 96/38 actions to make them #### on opening.
I have a couple of early German 98's that were made to much higher standards than the later war models, and they shoot great, but not up to the standards of a Swede, in my opinion.
Check Trade Ex and the EE, there are some really nice examples right now, as a matter of fact I'm waiting for a M96 target rifle I just bought from the EE.
Be careful though, they easily turn into an addiction!