Which size Rhino to get?? LOL

[jinx]

Hey guys. I"m very impressed with all the knowledge and how helpful you guys are. i spent a good 2 hours reading threads on this site, and i have learned a whole bunch.


I got a grow tent which is 5' x 5' x 7'
i'm planning on growing 4 plants.

I figure a 600 watt hps light will be enough. i seen a good kit with ballast
http://www.tigerhydro.com/sw-hpsset600.html

i'm looking into filters right now.
I want 100% no smell.

Which size filter do you recommend for this

Here is a site i found which sells a whole bunch.
Which is best for my application

http://www.hg-hydroponics.co.uk/rhino-filters---carbon-filter-426-c.asp


Thanks

[Law Abiding Citizen]

im no go with feet (sizes lol) if thats a 1.2m tent?? id go with 6 inch rhino (big) with two speed fan.
speed 1 winter, speed 2 summer should be good. i think a 5inch is not enough