@ricred - I think those amps are relatively close in sonic signature. They are not extremely warm and not extremely fast, but both pretty neutral. If you had a radical mismatch, I think you would notice more differences.
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@atownkeep - I hear you. I don't think trying to get a AVR Receiver or Integrated would really be the answer here, as they all have definite differences. I think it's much better to look for a set of amplifiers that would closely match your Luxman amps. Then the choice of HT Premp/Processor is not that critical, since all channels would be somewhat matching. Since HT movies really need excitement, I would probably recommend a very high resolution HT Processor for your scenario. The warm Luxman/other amps would sound too dull with a warm HT Processor such as Marantz or Bryston SP3 (yes, the SP3 is really laid back). I am totally not a fan of room correction, although many other people are. Both the Krell Foundation 4K and Anthem (either D2v 3D or AVM60) have their own auto-eq and room correction. They are both high resolution processors and support 4K. The Classe Sigma SSP Mk II is also a good high resolution 4K processor, but it does not have auto eq or room correctoin.
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That is kind of why I put forth the idea of getting a Parasound amp - it is on the warmish side, but still has good slam. The A31 is probably a great price for a solution ($3200 retail). Other amps could be like Aragon (they have both a Iridium monoblock a 8008 stereo). Or something like a B&K, but they are very old. I'm sure there are other warmish sounding amps. You could try posting that question in the "Preamp/Amp" thread as "recommend an amplifier that sounds very close to Luxman 900u and offers both a monoblock and stereo amp". The list of manufacturers that would offer a 3-channel which also has that warm sound is very small.
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Maybe an idea would be to pick/buy your HT Processor and then try a Parasound A31 amp from Audio Advisor. They do have a 30-day return policy, so if it's not close enough sounding, you can return it.
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@atownkeep - I hear you. I don't think trying to get a AVR Receiver or Integrated would really be the answer here, as they all have definite differences. I think it's much better to look for a set of amplifiers that would closely match your Luxman amps. Then the choice of HT Premp/Processor is not that critical, since all channels would be somewhat matching. Since HT movies really need excitement, I would probably recommend a very high resolution HT Processor for your scenario. The warm Luxman/other amps would sound too dull with a warm HT Processor such as Marantz or Bryston SP3 (yes, the SP3 is really laid back). I am totally not a fan of room correction, although many other people are. Both the Krell Foundation 4K and Anthem (either D2v 3D or AVM60) have their own auto-eq and room correction. They are both high resolution processors and support 4K. The Classe Sigma SSP Mk II is also a good high resolution 4K processor, but it does not have auto eq or room correctoin.
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That is kind of why I put forth the idea of getting a Parasound amp - it is on the warmish side, but still has good slam. The A31 is probably a great price for a solution ($3200 retail). Other amps could be like Aragon (they have both a Iridium monoblock a 8008 stereo). Or something like a B&K, but they are very old. I'm sure there are other warmish sounding amps. You could try posting that question in the "Preamp/Amp" thread as "recommend an amplifier that sounds very close to Luxman 900u and offers both a monoblock and stereo amp". The list of manufacturers that would offer a 3-channel which also has that warm sound is very small.
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Maybe an idea would be to pick/buy your HT Processor and then try a Parasound A31 amp from Audio Advisor. They do have a 30-day return policy, so if it's not close enough sounding, you can return it.