Hi Dave,
As far as I understood, in Europe, C-2420 (the evolution of C-2410) will be released in December. However, if founds are limited, I would advise you to go for the C-2410. On one hand, the new C-2420 will be 10% more expensive than the old now C-2410. On the other had, the price of the C-2410 will go down significantly now. My A-45 & C-2410 combo cost me less that the price of the new C-2420. I bought demo units that came with full warranty!
As it is most often the case with Accuphase electronics, the improvements from one generation to the next are minor, IMO certainly not worth the huge price difference.
Have you decided which speakers will you buy?