I came back to this hobby about 2 1/2 years ago and have built two systems. Some of my equipment is new and some is used. It's always great fun to be the first to unbox a new piece of equipment. Having fully warranted equipment can be a good thing as well. If I were to do it all over again I'd probably go all used. I've discovered if you know what you want and can be patient there are awesome bargains to be had by purchasing used equipment. Sort of the same argument as whether to buy a new or mint condition used car.