[J.C]

IMO the Inzer is worth the extra money
It won't break, its top of the line, looks cool, and it should last your forever unless you outgrow it (which is pretty hard to do) or lose it
I'm using a medium, I have 5 holes to go up, 5 to go down, I'm right in the middle
You could probably fit a medium/large

I'm a big believer in belts
I only use it during heavy sets where I feel like it's a bit risky, it allows me to push myself more knowing that I'm protected and supported, better safe then sorry
I wouldn't use it for warmup or anything relatively light though and every now and then I like to drop the weight a bit and work heavy without it; I don't want to rely on a belt all the time
But be sure you're breathing correctly because it doesn't do anything if your not breathing into your stomach (valsalva). Also develop relatively good form, strength, and knowledge before throwing one on
I always see phaggots at the gym using a belt when their half squatting the bar and 135 with the bitch pad