The 25wssm was made to give the same ballistics as the 25-06, right? So, why not go with the more popular 25-06 instead? Maybe you like the idea of a short action, a lighter gun, whatever.
I do suppose that if you handload a 25wssm would be nice, as it uses a little less powder. The -06 can be handloaded a bit hotter if I rightly recall... not that there's really any reason to shoot hot loads. I load my 25-06 light with Varget (be it 75 or 117gr bullets) as it is just because I don't need any extra power.
Don't handload? Well, I'd probably go with a 7mm-08 then myself. Performance is about the exact same, and it's more popular with factory loads. Time to start handloading if you don't. It pays for itself.