Nuprime st10 or nuforce sta200, or parasound a23

Thank all of you for your replies! About the nuforce, does any of you have had a problem connecting spades on the left speaker post? It seems almost impossible because it's positioned  like in a hole.
Also the nuforce review compare very superficially but positively with the nuprime, can somebody confirm this similarities?

my cables have 1/4 inch spades and fit in fine, though I could see how larger spades might be a problem

About the mytek i also checked it, but I will be paying for futures that I will not use, it looks like a nice device though, but thanks for the advice

Audio Advisor is again selling the Nuforce STA200 for $499.  Purchase spade to banana plug adapters from monoprice (actually they call them Gold Plated Speaker Banana Plugs, Closed Screw Type) for about $5 for 5 pairs and less$ for 2 or 3 pairs and you are good to go. 

I own a Nuforce STA 200 and it is, imo, an amazing little amplifier, and at the $499 price, and very good purchase. I use high quality banana plugs. However, as I have stated in a few other threads, it has a very high gain of 34.5 db and has an input sensitivity of .45 volts. I needed to go passive as a preamp ( glad I did ), because with a few of my preamps, the gain was so high I was getting hum in my system. Granted, I use extremely efficient loudspeakers, and it was a problem with only these speakers. Other speakers were not an issue. However, the volume control on most preamps will hover at around 9-10 o’clock in most situations. I have the amp just over a year, and have sold many high end amplifiers in my collection during that time, because this amp bettered them in reproducing music. If 80 wpc is suffient for your speakers, I cannot recommend it high enough. The dozen or so Class D amps I have tried did nothing special for me, but again, this was through " my ears ", and I know it is a great technology. So, Enjoy ! MrD.