I found these amps (Soundstream reference Micro - RFM 600.4D and RFM 700.1D) for my car. Now there is not a lot of literature available on the same. The reference model is being sold elsewhere outside America and it is basically the Picasso Nano series. I am looking for good amps and would be ready to spend more. Having some difficulty in procuring something good. Pioneer is also available in nearly the same price (going upto 21 K). Can you please suggest and also give some reviews or ideas about the soundstream. The original old school reference series but if one has to buy should he go for these or normal pioneers.