I've decided that it would be a good idea to get into PC Engines whilst I'm in Japan. There does seem to be a bewildering range of options when it comes to hardware though. I've narrowed it down to either an Duo R or RX model. My question is, does the RX offer anything over the R except a slightly different colour scheme and the 6 button pad? If not, I'm tempted by the R since the RX lacks a headphone port which would be handy for hooking it up to a surround sound system at some point.
Also, what kind of price should I be looking at and what should I check for in terms of necessary peripherals?