As a fellow Andra II owner, I offer you my congratulations on buying an excellent set of speakers. I have lived with mine for about 18 months now, and I still love them! I have never tried any of the "monster" amps, but I can tell you what I am using.
I use the 200 wpc hybrid, Lamm M2.1 monoblocks. These amps provide me with rock solid bass response, along with a very refined mid-range. (These particular monoblocks are very slightly rolled off in the treble region, but other than that, they are incredible amplifiers. My upgrading to Nordost Valhalla speaker cables has reduced the treble rolloff to a barely audible concern. If I had not heard my friend's M2.2s (see below), I probably would not even realize there was any treble rolloff at all.) I paid $7K for a used pair from a local seller.
My recommendation, (if you can afford them), is to try the 220 wpc hybrid Lamm M2.2 monoblocks, (which replaced the M2.1s in the Lamm line). I have two friends who use these amps in their systems. This design has eliminated the slight treble rolloff, while keeping the rock solid bass response, and the very refined mid-range. (They are a slight bit more transparent too, according to my one friend who upgraded from the M2.1s to these amps.) When a used pair show up on Audiogon, I hope to be in a position to buy them. (They rarely show up unfortunately! I've only seen a demo pair listed on Audiogon, and those were listed for $12K. The new price is $24K, I believe.)
FYI, Paul Bolin, (reviewer for The Audio Beat), also uses the Andra II speakers, (and Valhalla Speaker cables, btw!), and he uses the hybrid 110 wpc, (pure class A) Lamm M1.2 reference amps. He says this amp works great in his small-medium sized room. (I considered trying these amps in my system, but I have a fairly large room, and I don't think it would have enough power. And I have heard the M1.2 and the M2.2 and they sound very similar, (the M1.2 being just a bit more sweet sounding), so I think I would prefer to have the extra power of the M2.2s.) Used, I've seen these as low as $7,500, (once), but $10K is the more usual price, and these show up on Audiogon a few times a year.
My two cents worth anyway.
Good Luck in your search.
I use the 200 wpc hybrid, Lamm M2.1 monoblocks. These amps provide me with rock solid bass response, along with a very refined mid-range. (These particular monoblocks are very slightly rolled off in the treble region, but other than that, they are incredible amplifiers. My upgrading to Nordost Valhalla speaker cables has reduced the treble rolloff to a barely audible concern. If I had not heard my friend's M2.2s (see below), I probably would not even realize there was any treble rolloff at all.) I paid $7K for a used pair from a local seller.
My recommendation, (if you can afford them), is to try the 220 wpc hybrid Lamm M2.2 monoblocks, (which replaced the M2.1s in the Lamm line). I have two friends who use these amps in their systems. This design has eliminated the slight treble rolloff, while keeping the rock solid bass response, and the very refined mid-range. (They are a slight bit more transparent too, according to my one friend who upgraded from the M2.1s to these amps.) When a used pair show up on Audiogon, I hope to be in a position to buy them. (They rarely show up unfortunately! I've only seen a demo pair listed on Audiogon, and those were listed for $12K. The new price is $24K, I believe.)
FYI, Paul Bolin, (reviewer for The Audio Beat), also uses the Andra II speakers, (and Valhalla Speaker cables, btw!), and he uses the hybrid 110 wpc, (pure class A) Lamm M1.2 reference amps. He says this amp works great in his small-medium sized room. (I considered trying these amps in my system, but I have a fairly large room, and I don't think it would have enough power. And I have heard the M1.2 and the M2.2 and they sound very similar, (the M1.2 being just a bit more sweet sounding), so I think I would prefer to have the extra power of the M2.2s.) Used, I've seen these as low as $7,500, (once), but $10K is the more usual price, and these show up on Audiogon a few times a year.
My two cents worth anyway.
Good Luck in your search.