Trying ot decide and purchase right now!!!!! which has more room to hold stuff? botkier Stirrup 16 x 12 x 2 or Medium Trigger 9 x 12 x 6? I know the stirrup seems to have a few more inches, but being so narrow just 2" makes it not hold as much! I can't return once I buy and I need to order ASAP! Please help or suggestions!!!