UcD180 or 400 for Bi-amped config?

[magils]

I'm buildning a pair of speakers with the following configuration;

1 SS 7100-01 tweeter,
1 eton 5-880 midrange and
2 eton 7-372 woofers (Drivers are already purchased)

Current plan is a Bi-amped configuration with active xo between bas module(2x372) and mid+tweet, each "package" driven by an UcD module.

Will UcD180 be enough? UcD 400 seems to be overkill or?

Or two Ucd400, maybe 3 UcD180 and a triamped config?

/M