Here are the three speaker options I'm considering.
1. Purchase a PSW-650 to mate with my SDA-2As. Cost around $550.
2. Purchase LSi9s and PSW-650. Sell the SDAs. Cost around $1500.
3. Purchase LSi15s. Sell the SDAs. Cost around $1500.
Some of the decision will be driven by my auditioning the LSi speaker line this weekend. I'm just putting out feelers.
I don't guess I'll go wrong with any of these options.