I am not a big integrated amp guy. It is my observation that the best audio comes from separate pre-amp and amp combo. In that, you will need to budget for interconnects as well. Not Monster Cable...please don't. … and...don't buy a single dang thing that is coming from China on ebay,,,especially periferals such as cables. Fraud everywhere.
Two of the best reviewed 5.1 - 7.2 pre-amps under $5k are from Emotiva (for stereo best sound) and from Marantz (for surround best sound). The Marantz can be had at very good prices refurbed or used and would be in line with your speakers abilities and price points. There's a LOT out there to mill thru though.
Not sure what your budget is, but (don't laugh) one of the best amps for the money new (IMO) is the Monoprice Monolith 7, which can be configured as 2, 3, 5, or 7 channel, as it is modular, and you can add channels as your budget allows or needs demand. It was awarded amplifier of the year 2016 by one of the big (I think it was Absolute Sound) audio review publications. Monoprice basically ripped off the design of Emotiva and produced a quality at near the Outlaw Amps quality for 2/3 the price. Above that would be the Outlaw, and then the Emotiva, and then the other amps you have already mentioned, ie NAD and Parasound.
Then used is another consideration. A good number of enthusiasts flip through their gear every 2-5 years. You can get some really great deals on very hi end amps pre-owned, from craigslist and places like Audiogon, and yes, Ebay. Amps are as near forever as it gets amongst your components. The design of most standalone amps is very straightforward, without much of any, if at all, circuit boards, or delicate items...they tend to be power generating tanks. When you buy a separate amp, its tech is good for 20+ years, and the sound is good for as long as you are happy with it. Take the Parasound Halo A51/21/31 line for example. Their design is completely unchanged since its introduction in 2003...yet they are still regarded as amongst the very best at their price point when purchasing new, today, and even in recent years have received best of awards from audio publications.... for a 15 year old design. Bryston amps carry a 20 year transfer warranty and they are awesome...slightly crisp on the highs, but your Golds would do justice with that.
Two of the best reviewed 5.1 - 7.2 pre-amps under $5k are from Emotiva (for stereo best sound) and from Marantz (for surround best sound). The Marantz can be had at very good prices refurbed or used and would be in line with your speakers abilities and price points. There's a LOT out there to mill thru though.
Not sure what your budget is, but (don't laugh) one of the best amps for the money new (IMO) is the Monoprice Monolith 7, which can be configured as 2, 3, 5, or 7 channel, as it is modular, and you can add channels as your budget allows or needs demand. It was awarded amplifier of the year 2016 by one of the big (I think it was Absolute Sound) audio review publications. Monoprice basically ripped off the design of Emotiva and produced a quality at near the Outlaw Amps quality for 2/3 the price. Above that would be the Outlaw, and then the Emotiva, and then the other amps you have already mentioned, ie NAD and Parasound.
Then used is another consideration. A good number of enthusiasts flip through their gear every 2-5 years. You can get some really great deals on very hi end amps pre-owned, from craigslist and places like Audiogon, and yes, Ebay. Amps are as near forever as it gets amongst your components. The design of most standalone amps is very straightforward, without much of any, if at all, circuit boards, or delicate items...they tend to be power generating tanks. When you buy a separate amp, its tech is good for 20+ years, and the sound is good for as long as you are happy with it. Take the Parasound Halo A51/21/31 line for example. Their design is completely unchanged since its introduction in 2003...yet they are still regarded as amongst the very best at their price point when purchasing new, today, and even in recent years have received best of awards from audio publications.... for a 15 year old design. Bryston amps carry a 20 year transfer warranty and they are awesome...slightly crisp on the highs, but your Golds would do justice with that.