A lot of people like Aqua Clear's. I use a Magnum 350 cannister in conjunction with a Penquin 330 HOB on my 46g and I use an Eheim 2026 on my 30g. The Magnum is cool, but in it's OEM setup offers no biological filtration. The Eheim is awesome, but pricey. Eheim makes the best canniter filters. If you don't care about price, Eheim is the way to go. Rena is a good alternative with a lower price. If you want a HOB, AC.
Visi-therm Stealth.
I'd say always look on both Foster and Smith and BigAl's, compare prices. Also, try froogle, it'll do the walking for you. Pricematch at Petsmart can be worth it on one or two items. Shipping at Fosters and Smith is cheap and doesn't get above $14, so if there is a lot you want, often times it's way cheaper to order it all at once and pay shipping once. Even with shipping, it'll be cheaper than Petsmart price match. For example, API Master Test Kit is 29.99 at Petsmart(online and in store), it's $15.00 + $10.00 at Foster and Smith. You already save $5, and anything else you order is either free shipping(basically) or just $4 more shipping for big stuff.
Visi-therm Stealth.
I'd say always look on both Foster and Smith and BigAl's, compare prices. Also, try froogle, it'll do the walking for you. Pricematch at Petsmart can be worth it on one or two items. Shipping at Fosters and Smith is cheap and doesn't get above $14, so if there is a lot you want, often times it's way cheaper to order it all at once and pay shipping once. Even with shipping, it'll be cheaper than Petsmart price match. For example, API Master Test Kit is 29.99 at Petsmart(online and in store), it's $15.00 + $10.00 at Foster and Smith. You already save $5, and anything else you order is either free shipping(basically) or just $4 more shipping for big stuff.