KeyShite sounds better if you ask me (The British english version of shit). But Sigroy does sound better.
I have to admit tho that i am getting used to the Keysight name a bit more, still does not sound as nice as Agilent or the wanky AM modulation envelope logo does not look as nice. If you want it to sound nice just google up the list of names that was proposed to rename Agilent into, you will think that Keysight is actually a pretty good name after you read how bad the others are.
Okay back to the real topic.
These Siglents do look like pretty nice stuff, but the new Rigol Z series is going to be tough competition to it since it looks like its the same thing except much cheaper.