I am new to bike clothes, and 5' 11'' but well over 200 lbs, so I have a waist-size issue with most cycling clothes. I have a pair of XXL bike shorts (PI) that fit great, though I have some waistband rollover. I keep reading about the advantages & comfort of bibs. The trouble is, I don't want to cough up $150 (gulp!) for something that fits my waist, but has droopy straps. Is sizing too hard to permit internet shopping? I invite your constructive comments. I can't be alone in this.