Which Groove Briefs to Get?

[JDarty6173]

Just wondering which groove briefs everyone would recommend out of the following that I've looked at...I will be using them on DE squat/Dead day..

Inzer Groove Briefs or Heavy Duty Groove Briefs
Frants Power Briefs or Double Power Briefs
Titan Briefs or Titan Dual Quad Briefs
Crain Genesis Power Brief or Genesis Double Power Brief
Crain Power Brief

Thanks guys

Jon