I've found all 3 ( Kiefer, Swim2000, and Swimoutlet) have good deals. It depends on what you are buying. I would check all 3 and not only compare prices, but also shipping and tax.
If it came down to all being the same price - I look at who sponsors our sport more.
I've noticed Kiefer, in my short experience with USMS (1year swimming), seems to have more sponsor activity.
I've found all 3 ( Kiefer, Swim2000, and Swimoutlet) have good deals. It depends on what you are buying. I would check all 3 and not only compare prices, but also shipping and tax.
If it came down to all being the same price - I look at who sponsors our sport more.
I've noticed Kiefer, in my short experience with USMS (1year swimming), seems to have more sponsor activity.