I have considered selling my GNX4 and getting a new RP350. My friend just got one with the new DNA Sound Chip and the presets sound a little better Plus I would put about $100.00 back in my pocket. Although there are some incredible presets available from MFX Supermodels and guitar one and guitar world websites.
I run my GNX4 through a Peavey Triple X tube amp and I love some of the sounds. But like I said I have always wondered how individual pedals would sound. My biggest problem was that I got a little crazy and had a little to much equipment to soon so I was a little bewildered for awhile and have still yet to tap into all the possibilities....I guess there could be worse problems to have.