What are ideal impedences between tube and ss?

There are a few threads on Agon on this subjcect but I want to know what is considered a low output and high input impedence(numbers). I have a AE-3(Cary) with a 560ohm output. My Audible Illusions amp(S-120) has a input of 35K. To me this looks like a match but without a reference I'm not sure. The two together sound great! I'm not a tech but do like to know what's going on synergy wise. Thanks in advance and enjoy the holiday.