Two things I would consider before switching to a high sensitivity design like the Avantgardes:
1) Sensitive horns are finicky beasts and may require other significant tweaks to your system afterwards to sound right. In other words, be prepared to have to tune your system to the horns more so perhaps than other designs.
2) For creating a large listening area, wide dispersion or even more omni-directional designs are needed. I'm not sure that these horns fit the bill for that. I could be wrong though. I'm sure others will correct me if so.
1) Sensitive horns are finicky beasts and may require other significant tweaks to your system afterwards to sound right. In other words, be prepared to have to tune your system to the horns more so perhaps than other designs.
2) For creating a large listening area, wide dispersion or even more omni-directional designs are needed. I'm not sure that these horns fit the bill for that. I could be wrong though. I'm sure others will correct me if so.