There are a lot of excellent STEREO options for around 500 bucks instead of 1000 with a low weight, which my female muscles like:

- JBL Eon 206p (posted above, I own them now)
- 2x FBT J5a
- HK Nano 300 or 302.
- 2x db K300.
- Bose Sounddock 10 (only available 'used').

I'm quite sure they all have higher SPL than the Bose S1 Pro.