Aqua-safe ro/di users

[BCWolfen]

Hey guys, just checking out ebay (can't believe how much cheaper than at Home depot, insane) for a ro/di unit. I don't think my under the counter unit will provide me with the amount of water I'll need, and its hooked up to my fridge and drinking tap so I'd like to keep the new one seperate.

Anyway I'm not sure which way to go between the 2 most common ones I've seen.

I like the AQUARIUM 110GPD RO+DI REVERSE OSMOSIS FILTER
at http://cgi.ebay.com/ws/eBayISAPI.dll...348780600&rd=1
As it seems to have standard filters and you buy extra resin and accesories for them.

The other one USA Reef 6 st 100GPD Reverse Osmosis RO+DI Water Filter at http://cgi.ebay.com/ws/eBayISAPI.dll...347902785&rd=1
Also seems good, but it looks like it may have proprietary filters that can only be ordered from them.

Does anyone have any suggestions or comments on either unit?

Thanks