TWC Gives you a set of Component Video Cables. I've tried both component and HDMI and cannot tell a difference on my HDTV when at viewing distance (can barely tell a difference at 2ft away from the screen on Discovery HD, HDNet, and InHD channels which have the best HD video streams.)
It makes life a lot easier on my wife to have everything feed in with Component cables so she can use the Receiver to switch to different components (has component video switch built in.) The exception is my HTPC which I feed the TV with DVI.
That being said, I'd look to see if your audio receiver has a component video switch and check the quality of it. If it passes your quality factor, I'd go with Component video cables and use your receiver as a switch (also makes an excellent excuse to upgrade a receiver
I've never used a HDMI->DVI adaptor cable so I can't give you a feel for if there's difficulties involved with getting them to work properly. I will say that one downside of going with HDMI on the SA8300 is that all other video feeds from the TV (Component, S-video) are dead the instant you plug the HDMI cable into the back of the SA8300. If you're TV is like mine, it only supports the PIP subwindow via SD video feeds. Not a big issue for non-HTPC users with the SA8300HD because it will do PIP for you, but I like to view a PIP of TV while working on my HTPC. I feed the S-video signal from my DVR to the TV for this purpose (you could feed cable to the TV and get 2-99 but you don't get the Digital Cable channels.)
I hope this helps with your decission instead of confusing things further.
BTW, the annual Crawfish Festival in Spring isn't that good, it's better to stay home and have a boil in your back yard when it comes.