I really recommend biamping these speakers using the NHT SA3 bass amp for the bass (it has a volume pot so it is easily integrated with another amp) and then a sweeter amp like the Pass Aleph 30 for the mids and highs... Using the SA3 gives you a lot more opportunity to play with lower powered amps.
The SA3 is no longer in production, but can be found here or on eBay (you could also use a pair of SA2 instead; these are more common).
Good luck
The SA3 is no longer in production, but can be found here or on eBay (you could also use a pair of SA2 instead; these are more common).
Good luck