I owned 3A-SIG for ten years…. there are many competently engineered amplifiers that drive them well. The Odyssey is certainly one and an excellent value. Anything Nelson Pass made in 100 wpc range. I used a Mac, Ayre, Quicksilvers, Aesthetix…and Threshold. The Ayre and Aesthetix are zero or low NFB designs which pair well w Vandersteens. My buddy in Atlanta runs his with a hybrid Music Reference amp.
The 3 is really a beast, while it’s very full range, it rewards an amp with grip and control.
For $5K you can get excellent amp and preamp…both….