Not sure what the MSRP is on the Luna vs the Sol though.
Well Scubastore has both, though the Luna is only like $2 less then the Sol, so I dont think there is much difference in price. My LDS has a Sol that was brought back from someone that bought it and decided a week later they wanted a rebreather instead and couldnt use the computer (wish I had that problem) so I might be able to get a good price on it.
I am very happy with the SOL. If you have any questions about it, let me know and I will help were I can.
Best Regards
Richard