I bought Wilbers 630 with 5 years guarantee, hand made and based on the riders weight, passengers weight, baggage weight, riding style, road types etc... Let's see what I'll get after couple of weeks!
But I'm afraid that when I get the new rear spring+shock absorber, the front may be too soft and it'll need replacement, too. That's what happened to my Honda CX... But I'll know that after 5-6 months... :(