^^^^ If the latter (SC-07) is a viable option, that's the way to go. I don't think you would be sorry in the long run.
At a more budget friendly level, to me the SC-05 would be an easy call over the VSX-23 (no disrespect for the VSX-23, which is very good, it just that IMO the SC-05 is even better). However, that is just me, and I don't have any need for a second HDMI output other than to permit access to another Custom setting in my Kuro. The convenience of that might offset the audiophile advantages of the SC. Not everyone hears a big difference.