Do you want just "good", or do you want to spend enough to arguably get "great" optics? If you want "good" just go to Andrews or Bintel - they sell GSO-quality mirrors in this range for a few hundred dollars. If you want to go to a higher level then have talk to Mark Suchting of Deep Sky Optics (DSO). He's a member here and makes excellent telescope optics professionally. He really knows his stuff. Top bloke too.
Cheers
Chris
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