@Xulonn
Back in the day I owned the ADS L810 series 2 powered by a Carver M1…now I have a pair of Salk Veracity STs powered by a 2Cherry….and yes, you are going to love the craftsmanship of the woodworking performed by Jim Salk's team! The sound ain’t bad either. The transmission line will give you a deep, tuneful low end that is easy to integrate with a sealed subwoofer if you ever decide it is needed.
The Salks are 6 ohm nominal, 4 ohm minimum….so you should probably consider their sensitivity as being closer to 86 db as I’m pretty sure the 88 db is based on 2.83 volts @ 1M which would be about 1.5 watts.
As for power and headroom: If you plug your data into this website calculator, you will see that with 2 loudspeakers placed within 4 feet of the rear walls and powered by 8 watts, the SPL at the listening position is 91 db…and with a 70 watt amplifier you are close to the 10x headroom for peaks.
(dB)
OK, 91dB SPL is the total level of two equal, uncorrelated 88dB SPL sources using the assumptions in your post. What is the significance of 91dB SPL? Is it just an arbitrary value?