I recently picked up my CCNA, and in spite of a decade (has it really been that long) in the field, I was shocked at how much I was either rusty on or just plain did not pick up the first time around. Best of luck to you in that pursuit. If I can offer some advice, go with the 2 test route, I think it was too much material to all go into one test.
As for the other part, I can't speak to the ACMA training, though I intend to pursue it once the budget year rolls around again. In the interim I am working on the CWNA, since self study materials are readily available.
Our company recently chose to deploy aruba in our schools and other offices, based in large part by the utterly fantastic experience I had with the Aruba Instant products. So I definitely plan to dig deeper into the Aruba portfolio, but that being said, I think the vendor neutral training that the CWNP provides is essential. There is likely to be some overlap between the tests though.