I would guess .... and this is really a wild assumption on my part with nothing but intuition to run on .... that the Spider Line is done? I think it is the POD and DT Amps for Line 6 now? (again, pure speculation on my part).
I have a Spider IV 120 (practice amp), Spider Valve 212 MKII (great amp but has become a backup option now) and a DT25 Head/Cab which I really love (coupled with a HD500).
So ... just FYI, have a look into the DT amps and see what you think? More $ for sure, but killer sound. The downside of course, (aside form the cost), is that they don't come loaded with efx like the Spiders. One has to admit that the price point on the Spider IV's was pretty remarkable.