The M1A is not a scope killer. It’s a wallet killer because you have to spend thousands of dollars for incremental but ultimately futile gains in accuracy, but it won’t kill scopes.
Of the scopes you listed, the Athlon Ares BTR is going to be among the best optically. They have a good record of reliability, and Athlon offers a lot of scope for the money. The Talos is a much lower level scope. I’m not sure what scope you mean by the Leupold Long Range 4-16x50. I would have to assume it’s either the Mark4 LR/T 4.5-14x50, or VX-3i LRP 4.5-4x50.
The Nikon FX1000 is discontinued. Nikon is no longer making riflescopes. I would not buy a Nikon if you have any concerns about reliability and warranty coverage. Nikon has always made good scopes, but you’re dealing with a discontinued product.
Of the scopes you listed, here’s how I’d rate them:
Athlon Ares > Leupold Mark4 LR/T > Vortex Viper HST > Bushnell Nitro > Athlon Talos
or
Athlon Ares > Votex Viper HST > Leupold VX3i LRP > Bushnell Nitro > Athlon Talos
I would also recommend that you look at the Athlon Midas or Vortex Viper PST Gen2 over the other options below the Ares BTR and Mark4 LR/T.