hi ya'll..... whats crankin?

i will be setting up a fish room soon and need to start planning it out. it will be for breeding and growing out. i know the best breeding set up but for grow outs i am drawn to both types. i am planning on having mostly 6x2x2's to make things easier but i could quite possibly have 8 or more tanks. the number of fish will obviously vary from time to time but i feel that i need to plan for the times when the set up is most heavily stocked.

here is the thing:

CENTRALISED FILTRATION (sump)
. from what i know it is easy to use
. can hold a large bio load
. would mean w/c are easier
. 1 filter doing the whole set up
. and i think it would do a better job - more water turn over

- would cost more to set up
- a bit more technical (which i love ) but still
- if a fish is sick the whole lot could be affected before i can do anything

SPONGE FILTRATION
. easy to use
. easy to set up
. relatively inexpensive
. does a pretty good job
. disease confined to the tank

- many units needed for large tanks
- not as much water turnover
- have to w/c every tank seperatly

which way would be my best bet?

thanx in advance