Filter(s) for 5x2x2' planted discus

I'm setting up a 5x2x2' planted tank for discus.

Bio-load not too high - 6 x 6" blue diamond, 40 or so rummynose and some Corydorus.

I'm trying to decide on filtration.

First decision is do I have one big filter i.e. Fluval FX5, Eheim 2080 Pro 3 or Eheim Classic 2260.

Or two smaller filters i.e. Eheim 2028 Pro 2, Eheim Classic 2217, Rena XP4 or TetraTec 1200.

I like the simplicity aspect of one big filter and less hardware in the tank.

But I also like the backup factor and staggered maintenance of running two smaller filters.

What would you do, and please don't say a sump...?

Cost isn't a major consideration.