Bridged NADs vs. Rotel Ra - 1062

@mistermonitors the NAD and Rotel units are both value integrated units from around 15-20 years ago.  Nothing wrong with that, both brands have a solid reputation.  Rotel for value, their claim to fame is they are solidly built, punch above their weight class by always striving to deliver more value per dollar.  NAD is a bigger brand that offers products in various price brackets with some value products all the at up to some higher end gear.  I wouldn’t buy one of these older units and bridge them into mono’s, you can but you’ll likely lose more than you’ll gain.  The NAD C372 should be a nice option for you, it will likely drive most speakers, NAD has been in the space for a long time producing great products, when this originally launched was a unit that did everything well.  If you go the NAD or Rotel route, don’t spend too much on them, they retailed between $600-800 when new back 20 years ago.  If you can snag one for a $100-200 that’s in good shape, tremendous value if you are going to use it, not much value on the used market.  
 

If you wanted to go with a modern integrated there are some good options in the $1,000-2,000 range but that’s a big jump from what you are looking at. If you went with a more modern integrated you might not really gain much in performance but you would potentially gain a unit set up for a more modern set up incorporating streaming / digital.  

I have owned a couple of NAD C356BEEs, still have one. I believe them to be a good budget integrated amplifier. The C356 was preceeded by the C355 so the 356 would have less years on it.

As others have indicated I would stay away from bridging amplifiers. Use stereo mode. Just stay away from hard to drive speakers. 

Pretty much what @mesch said. While bridging amps isn't necesarily bad in and of itself usually, it can be if the speaker load is unstable or hard to drive.

I had a pair of Hafler DH-220s that I ran in bridged mode to drive a pair of ESL speakers. Sure, great power but something sounded "off". When I decided to use just one channel of each amplifier for each channel the difference was quite audible! There was much more detail and clarity and dare I say even warmer sound.

Yes having extra power is nice (440 wpc bridged vs 120wpc non-bridged) but depending on the speaker it can be problematic. Of course buying speakers that are efficient and easy to drive helps a lot. 

Happy listening.

@mm1tt77  Agree with most of what you say, but the used prices that you mention are probably unrealistic. A quick check on EBay had one for around $350.  Other places might be cheaper?

@assetmgrsc you’re right, when I researched the units this morning, some used options came up but I didn’t look closely at them.  Some were old adds and others were for units that weren’t fully functional.  I was more focused on learning about the different options the OP referenced as they aren’t familiar units to me. 
 

Looks like refurbished units go for almost what they cost new on the NAD.  If they are selling for those types of prices I’d gather they were good units back in the day and still good units.  Rotel Units seem to be on the $400-800 range, what’s curious on the Rotel is some of the adds from 2-3 years ago had Units selling in the $ 150-300 range.  The pricing has taken quite a jump.