Several months ago I bought a Zoom H6. I bought this mostly as a device for non-concert gigs. I have mostly used it for running a shotgun mic for booming. I like the simplicity of it compared to the R4, plus it is so much easier to carry around. I eventually want to tape more concerts, but I am thinking of switching up things with my recording equipment. I will say that I love my R4, but it seems like it would be best to do something new. I am thinking of getting a preamp, but I am not sure which. Probably something that I could use with my 414s and shotgun that works for the ins on the H6. I am also worried about selling/trading my R4 and then changing my mind. Not really sure what to do so I figured I would ask. If I can trade, do you think people would be willing to trade an R4 for a pre? Are they worth that much now? Any advice would be great.