Does this mean I need a really powerful AV receiver to drive these speakers and if so what model should I look for? Or should I look for AV separates? My budget is around $ 2000. If I use a AV receiver like the Cambridge Audio Azur 650R which has Power Output as below, will it cause clipping or damage my speakers
Sensitivity = 88.5 db (1 W, 1 m)
The 890DC Ventos are not the most efficient speakers so the more power that you give them the better they will sound. I don't have a lot of experience with Cambridge so I'm not sure about their amps.
An old Arcam AVR350 would probably drive those sufficiently and it has a great preamp section for 2 channel music. Separates would probably be the best path for you down the road IMO, but a 2K budget makes that a little tough.
Parasound is coming out with a new receiver in a month or two. Its supposedly will have 140 watts in 8 ohms and 250 into 4 ohms. This looks like it could be a winner if it ever comes out as they make great amps. Halo Amps are also extremely good for the money and would drive the ventos just fine. If I were you I would be looking for 250Watts/per channel to really make those speakers come alive. I have heard them hooked up to lesser equipment and they sound like a totally different speaker.