thing is, there will always be the debate about different calibers being better than others, and this debate will be around as long as there are guns and ammo! pick what makes you happy and practice with it until you can hit what you aim at. really doesn't mean diddly squat if you can't hit your target, regardless of how good or better than others it is.
me, i practice with a lot of 45 ACP. reason is, i currently own three different pistols in 45 and i reload a lot for that caliber. i also own many other pistols in many different calibers, but i prefer the 45. does that mean to me that the 45 is the best or end all to the caliber debate? no, it's just what i prefer. period. i like every caliber i own, or else i wouldn't own them or shoot them!
just make your choices as to what you like and what suits you, and not someone else.