Novices and newbies discussion

I’m just starting out here but I could use some guidance. I’ve been eyeing a cage for ages and am leaning toward the CB-6000s. I took my measurements several times, averaging 3.25 inches while flaccid. Reading around suggests it’s fine to go slightly shorter rather than longer. So, does anyone know if the 6000s will suit me, or should I consider the standard 6000?