Budget amp for NS-1000. Rotel, march or parasound?

The salesguy brought the Yamaha NS-1000 and two amps, Rotel RB970 and the A23... He plugged the Rotel first and after I disconnected my Dynaudio BM12A and listened to the NS-1000, it seemed like I was listening to a bad radio station, really poor definition and no bass at all. Then we installed the A23 and things improved.

I have the A23 here still, but am using the HCA-2200II, I like this but the A23 seems better (and louder) despite being less powerful in RMS output.

Still, I'm not 100% satisfied, plus the A23 is a bit expensive and I use the 2200II in my B&W setup so I need another amp. I'd be happier paying next to the A23 price for the Marsh (my bad for March) as long as I hear a good word on them. I considered the Rotel 990BX because it's available really cheap (USD400 less than the Marsh) and more powerful than the 970BX. 

In another forum some guys suggested my using a pro audio amp like QSC or Crown on the Yamahas and I am also considering that now... Any ideas?

thanks for the answer

It sounds like the Rotel might have some technical problem or the speaker polarity was wrong, or maybe both.

Pro amps are for some while not so much others. One I can live with is my crown XLS-1500. You could probably purchase one new within your budget plans if there are still some available. The XLS-1000 has somewhat different circuitry and you might not like it for more serious listening.

Yea, I could get an used unit of the XLS-1500 for about U$400.. Which is about half of the Rotel RB990... To be honest I want the best solution, when I say budget I mean I don't want to shed U$2000 on a Bryston... Anything up to $1000 stretching a bit is acceptable, as long as I get the bass out of the Yamaha NS-1000 with good detail and clarity, demanded for my production needs...

After reading this thread:

http://www.hometheaterequipment.com/mono-stereo-amps-59/crown-audio-xls-drivecore-series-amplifier-o...

I’m pretty much sold on Crown amps... I must try them. Now, I feel I must follow Audiogon forumers advice as it has always been good advice (which I not always followed), so I have the option of getting a XLS 1500 used ( I have no issues with used gear, but what possibly is PA gear is another story...) or a new XLS 2500 for a 70% higher price. (roughly 600 vs 350 dollars).

My question is, the 2500 is good or should I stick to the 1500? Remembering my Yamaha is rated 100w max and I’d hate to overload it with this pro gear experiment...

So, I tested the XLS1500 and it's nice, but now I want to test another high end amplifier. Should I go for Marsh A400S, Rotel RB1080 (roughly same price) or Rotel Rb990BX (Half price)?

I need maximum detail and plenty of bass...