My value is on the Raal Tweeter SongRT or the Song 3. I have Raal tweeters, and the best way to describe them is that they are open and detailed, and many users claim they could never own a speaker without one. It has also been said that Dennis can coax every little bit out of a dome tweeter, to the extent where a listener couldn't tell the difference.
Beyond that, I am a big proponent of a 3-way design, but again here is he one case where I would not be afraid to buy a 2-way design. Moreover, the Transmission Line builds which the 2-way designs employ impart a very special bass quality that you really have to hear to believe. Lastly... my actual choice as a buy-in would be the Supercharged Song Tower: You can listen to most music on these without the subs... even though I use subs myself with the BMRs (also 34Hz extension). Regardless, the point is you don't have to go all in on the most expensive models. The SongRT, for example, will give you the best of it all for a great cost!
Consider your space, placement, and needs. Several of his speakers, he will build front ported or rear... and even for the TL designs, you can see one White Super Song that has the terminus in the front.
Don't lose sight of the "Standard Finishes," which cost a little more than the black or white base options.
Lastly, a nice little thing to know is that Salk is very active in helping his owners upgrade if they choose, and I've seen references to him helping sell the old speakers. The nice thing is, his speakers hold their value very well on the resell market. you might still take a hit, but not near what you would if you tried selling any mass market speakers a few years down the line.
Don't hesitate reaching out to him. Email him with the details of your space and what your goals are. He will help you make the right decision and work with you on dialing it in.
(As I've mentioned, I ordered my gear from Dennis' own company, Philharmonic Audio. He and Jim have been long-time colleagues, and Jim was building the cabinets for my last pair of speakers, the Phil 3, when Dennis fell ill and ultimately retired. Jim and Dennis reached an agreement that Jim could take over the orders from Dennis if the individual customers agreed. I did, and Jim finished my speakers earlier this week. They shipped yesterday.
https://forums.audioholics.com/forums/threads/philharmonic-3-packing-and-shipping.114642/
This wasn't even Jim's speaker, and he built it as if it were, and did so in the face of some crazy issues. He could have easily doubled the price on me had he chosen... he could have just flat out refused to continue the project. Instead, in roughly 1 week, I'll have those bad boys anchoring my rig.
To me, I understand that if ever I choose to upgrade, it would be with Salk Sound, or I build my own! That is how much value I place in his and Dennis' work. So we will see... if I can build better in 10 years time or not!
)
Cheers!