Nuforce STA200


I am curious about the Nuforce STA200 amplifier  If anyone has experience with the amp it would be appreciated if you would share your listening impressions, both good and bad.  Some of the descriptions I have read classify it as a class AB amp and others a class D amp.  I am not technical savvy about these things, can a single amplifier be both? 
Thanks
George
jetter
Let us know how the passive and  the STA200 match us sound wise. Im considering a passive pre myself
Post removed 
Thanks again jl35 and aberyclark for providing your listening experiences.  
No problem. The amp is really special IMO. I was amazed how deep the low end goes (not in a bloated way). The top end is very smooth. I would say its maybe just a small tad on the warm side of neutral. Which is great for my ZU "super" tweeters. I’m now shopping for a pre to replace my Nova pre. 
Does anybody have compared this Nuforce with the job 225?? Despite the power and price difference,  do they sound the same? If not Wich is better? It is worth the price  difference considering the Nuforce is selling for 499?