I have had a Malata DVD/Kareoke system for over a year now. No issues on overloading your system. You better off getting a system like this because all of the EQ and Mic setup is built in with the Kareoke/DVD system software. All you need is a set of wireless mics for $75 or more.
One more thing is that most of these players play all types pf format ... DVD-Audio and mostly all are Progressive Scan players. They are usually very cheap and have sometimes better componentry .... names like Malata, Shinco, Daewoo, Nintaus come to mind.
Go to your local chinatown electronics store. They will have a selection.
They look like these:
http://www.goldenshop.com.hk/AI-trad/DVD/index.htm