Re: Anyone Played a RG321
i actually got my RG321 for $220 brand new. yeah, the RG421 is a "better" guitar, but for me the RG321 made more sense. i like mahogany way better than basswood. pickups weren't an issue, i always swap for dimarzios. the necks are near identical so that wasn't a big deal, either. the rg321 has a bound neck, so that was a plus. the hardware on the rg321 isn't as good as a rg421, but the rg421's hardware ain't that great either. the bridge on the rg321 is really good, and is more like a gotoh fixed than the rg421. i know...i used to own a pgm500. not like that bothered me anyway. i plan on getting an lr baggs piezo for it.
for you, though, the rg421 maybe the better of the fixed rg's. being as you want to backup an rg570 and it is basswood. your tone will be more consistent. see when i got my rg321, it was to backup several rg's: rgt3120, rg2120x, rg520qs. all of which are mahogany. i got mine because i wanted an axe i could go back and forth between drop d and standard. so the rg321 was the obvious choice.