drilled vs non-drilled tanks for planted aquariums


Well I was already to purchase a 90 gallon last week, for a plant tank
I've been planning for a while, and got thrown a curve by my local fish
store.  I was planning on buying a stock 90 gallon AGA, which of course he
didn't have in stock, but he did have a 90 gallon "reef ready" tank that
he had just gotten in.  I hung up the phone and started searching through the
archives to see which might be better.  There wasn't a lot of information in
the archives, pro or con, although George Booths excellent article on his
SST (super show tank) was on a 90 "reef ready" with a sump.  So now the
questions, what is the current opinion on standard vs. drilled tanks as
planted tanks?  I see the advantages of the drilled tank as having a built-in
surface extractor, being able to hide the heaters in the sump, being able
to hide the C02 reactor in the sump, and the water level of the tank is always
constant; I have heard that this type of system may drive off C02 (something
about a wet/dri filter driving off C02 - admittedly I have no experience with
a sump.  Maybe this is a stupid question, but do all sump-type filtrations have
to be wet/dri?)  The alternative, is a non-drilled tank, with cannister
filtration, probably two eheim 2213's or something comparable, possible
advantages: two filters gives you some backup in case of a failure, and you can
spread them apart so you have in-take's and ouputs on both  end's of the tank,
for better flow.  So, what else am I missing?   Any other pro's/con's I need
to consider?

The discussions on this group have always been interesting - I am looking
forward to your replies :>)

david at joshua_medimg.emory.edu
In Atlanta, where fall turned to winter over night - Brrrrrrr.