How easy is it to run cable through your house, some houses are tougher than others to retrofit? If its not too bad, I would hard wire it all, the cable is cheap the results are better {IMO}... Sonos has its positives though... Cost wise its probably about the same to hardwire then buy all them sonos players...
Even if you buy a separate amp for zone two like the apa150 {on sale for $125}, then add a monoprice selector $50-, 6 volume controls $120, speakers $300, cable $100, ect you will be under $700... ALthough the sonos units are convenient, I like it built in...
As far as running rcas a long way, I wouldn't go more than 15 feet, I would convert to xlr for long runs sweetwater sells pretty much everything you would need to do it.....