Laguna: Kit is $184.99 which includes 2 air stones, 4 disks, silicone tubing, 50 watts, 60 db, 4 yr. warranty
Hakko: per phone call with them approx, $225 to create "kit" including above items. I need to call about warranty.
The Hakko 25 is 20 watts, 32 db
The Hakko 40 is 40 watts , 35 db
A two pack of diaphragms is $31.00 for Hakko 25 and $34.99 for a two pack for the Hakko 40.
So far, I've found AZ Ponds to have best pricing and they seem to have people who know their stuff when I call with questions.
If I go with Hakko, makes sen to have back up diaphragms as they aren't sold locally.
I was surprised they are not only quitter , but more energy efficient than Laguna. I'll check on warranties today. I have a "regular" air pump ( I'm out of town, so can't look at the brand), but am looking for something more serious for hot weather as my koi are getting big.