I had a C5i for several years. I liked it a lot. As others have noted, whether or not it has enough power depends on your desired listening volume in combination with your room size. (Bigger rooms need more power than a smaller one to reach the same volume.) Get yourself an inexpensive sound level meter so you can get a solid reference point for your desired listening levels. I rarely go above 85 dB these days and have no problems reaching my desired listening levels in a 24' X 14' room with a Schitt Aegir which is 20 w/ch 8 ohms; 40 w/ch at 4 ohms and a pair of 88 dB efficient 6 ohm Ohm 1000 speakers (though I do have a powered subwoofer for the low end which takes some of the load off the amp.)