As great as the First Watt amps are, I think that they might be a bit underpowered for the LS50s to sound their best. So I'd go for the more high powered models in that line.
I'd also recommend talking to Mark at Reno Hi-fi if you don't have a dealer in your area. He has a good return policy that will permit you to hear for yourself.
I'd also recommend talking to Mark at Reno Hi-fi if you don't have a dealer in your area. He has a good return policy that will permit you to hear for yourself.