Hi! I finally signed up for an account but I have been lurking on the forum for years. I have had my head shaved with clippers for about 18 years now and recently decided I wanted to go down to baby butt smooth. I have been experimenting with a variety of clippers and blades and have fallen in love with the Panasonic Arc4. I am still within my return period and can get the Arc5 for an extra $100. I am wondering if anyone has upgraded from the Arc4 to the Arc5 and can tell me if the improvement is worth the extra $$.