Yeah, "best" is pretty subjective. You're going to get a lot of people recommending whatever light they have because it was the "best" for them, whether is was price, availability, etc.
Most all modern LED fixtures will grow SPS given it meets the intensity (power) requirements of what you're trying to grow. At this point they are all just variations on the theme from a spectral ("color") standpoint. Some have more power, some provide better spread, some can sit right on top of the tank others need to be mounted higher.
The only requirement you specified was "SPS" and BoT mounts, that would suggest intensity (power) and spread/coverage to combat shadowing, but what size is the tank? Would you rather have the lights mounted higher or lower?
Radions have a proven spectrum for growing coral. They are also powerful lights, but the newer ones sacrifice some of the power for increased spread, which is also important for SPS. They need to be mounted about 8" above the tank. The new Gen 2 Nicrew lights mimic the spectrum and spread of the Radions pretty close.
AI Blades are the king of coverage, and they can site right on the tank rim, but you need multiples to get a "full" spectrum.
There are litterally hundreds of "good" options. Something for every budget. You need to prioritize what's most important to you and how that applies to the tank you're planning on lighting to find the "best", though.