Hello all! I have a question! I have a receiver that according to a review actually put out 90 watts to 7 channels. True or not I don't know. At least 90 per 2 channels. It's an Onkyo 606.

I have def tech bp6 supposed to have an over all freq response 30-30k.
I don't know how efficient.

Focussing on two channel audio. Not concerned with the sub at this point. It's just LFE. Without getting into room acoustics, I am looking for more detailed sound at low and high volumes.

If I wanted to spend $2-3,000 what would be your first upgrade and why? And supporting documentation.