I'm not familiar with either of those drives, but if you can find an EZQuest drive, I'd highly recommend it. I'm using one for 4 years and another for 3 years and I've never had problems with them. And EZQuest's tech support is great. OWC sells EZQuest drives:
http://eshop.macsales.com/shop/firewire/EZQuest/
I also have a Maxtor One Touch II and I wouldn't recommend it for only one reason - it gets incredibly hot if it's used for too long without periods of rest. I recently contacted Maxtor about it and they said it shouldn't be used continuously for more than 5 hours (i.e., it can't be used as a boot drive like my EZQuest can). If you're going to use the drive continuously, get one with an internal fan.
I'd also recommend that you get a drive with at least one Firewire 400 port so you can use the drive as a boot drive in an emergency.
Claire