advice for keyboard magazines,organisations,

[jeffiseverywhere]

hi guys,
am looking for some advice as to what the benchmark longterm
keyboard related magazines are that people buy.
something that i guess musicians/collectors would subscribe to and be happy
to recommend ,either national or worldwide publications.
also is there some kind of national or worldwide organisation that caters
for keyboard,synth users/collectors or musicians in general.
what would be the best resource to gain maximum exposure to sell a synth so
that others would find/hear about it.
thanks in advance,
jeff