Small Room. Go for it or forget about it?

In a small room,first-order crossovers are a necessity.You will not have the distance to allow the sound to re-assemble.In near-dield set-ups,tweeter height vs seating height is more of a factor.If the tweeter is dominant,things will appear to be bright-experiment.

Bob,did Sugarbrie answer most of your questions? This situation would be best served by a two-way design.Though squaring the number of drivers can still allow for a two-way to move large amounts of air in the low-freqs.Though it then becomes a line-source,as opposed to a point-source.
A 6db/crossover is the simpled way to design a crossover,as long as the drivers have adequate response through the crossopver range.Some manufacturers will stae a minimum seating distance (that allowing the drivers to re-integrate the soundfield).