Flip a coin?
I'm biased toward Philharmonic.
There is nothing wrong with Dave's Speakers. Especially if he's fixed the slight upward tilt in his Voicing which he used to use a few years back.
As to crossing to Subs, even the BMR Towers (like my Phil 3s) benefit from that: So will the Sierra Towers.
Between the HTs and the Sierras, I think the only edge you get with Sierra is a little deeper extension compared to the HTs. Flip that to the BMR Towers and the only thing the Sierras have on them is higher sensitivity.
So... it sounds like it's a battle over aesthetics for you, and we can't help with that.
If I stumbled on a sack'o'cash today, I would order up the HTs in a heartbeat. But like I said... I'm biased.