If you're really set on getting the 2213 and a supplementary filter, then that 2012 could work in helping the 2213's mechanical filtration (Which I will agree with that article Sf1 linked, is a weakness... but I do pwc
's about every 3 days, cause thats when my water level starts to get below where I want it, so I never really get build up in my tank..., but biologically the 2213 should be sufficient). I wouldn't bother with that HOB
, but I just don't like dealing with cartridges. Maybe just get the 2213 first, see how it works for you, then get an additional filter?
However, if I was worried the 2213 wouldn't be enough, then I'd just get the 2215 (or 2217 if you're gonna have goldfish or something with a huge bio-load). Then if need be, drill some or all the holes on the spray bar larger to get the current that works for your fish.
Personally I think the 2213's 'media basket' is a waste of space, and I removed it and put in the lattice screens all the other models have. It increased the cans capacity so you could put more stuff in it, but obviously it's still gonna have about the same flow rate.