@Bazza - Haha, thanks for the "warning"
. Yup I'm very familiar with the itch for upgrades. OK, hypothetically speaking IF I were to upgrade it would definitely be getting a pro-level sub, likely the Yammy DXS15 and stay with the DBR12. I'm not even close to pushing the 12's for top/mid, so rounding it out with a better sub for live sound would be ideal. But that's just a "what if scenario" of course.
@KFalls, I've been looking around at Stingray and I'll need to checkout KaraFun as well. For the time being I've been using the "Android Hard-drive Machine". It's all for home use, and is good for now. I think Stingray would be cool...I could just access the web version from the Android Karaoke machine as suppose to keep it simple. But you can't be free with Karafun.
The truth be told, I do enjoy Karaoke with friends and family, but what interest me most is trying to create the best audio set-up given my budget. I've heard so many home Karaoke systems that have sounded bad. I decided to explore a bit as to how it could be done "right" - for home use anyway.