I bought an Ibanez SR 505 to start out with, as I was just learning, the 5 just confused me. The neck size is strictly a personal thing, Really thin necks can be uncomfortable as can really fat necks. right now I have 2 Peavy foundations (Thin necks) an Epi T-bird(big neck)and a Squire II P-bass (Medium neck). I find the Squire to be most comfortable for me. I'm giving my opinion as a fellow beginner(less than a year)Start cheap & easy, you can & will upgrade after you know what feels right. I thought I was the **** with my pretty, active 5 string and that only lasted a couple of months.