External Mixer?

Hi guys, I'd like to ask a bit of advice if that's ok?
My current mixer is a stage mixer, rather than a DJ one, and it's been very useful for karaoke, but not so good as for DJ work. I have to send all the output from my laptop to just one channel (stereo fortunately), and there is no PFL/Monitor function on it. It is a superb mixer for karaoke and live performance though, so I'd like to keep it.
I've seen a great mixer for sale, 4 mic channels, 4 line/phono inputs, 1 master mic input for DJ, separate equaliser for both stereo channels (l/r), and most important, pfl on each channel.
I'd just like to know if it is better running Cross through an external mixer, and apart from the pfl and a dedicated channel for each deck, what advantages there might be. Or any disadvantages? Is there any impact on system performance when using an external mixer?
Also, would it be possible to still use my existing Mackie mixer purely to control the microphones, and connect it to one of the line inputes on the new mixer? I know that the connections are fine, being phono/rca, but I'm not sure if there's any issues running one mixer through another?
Sorry there's so many questions in there, but I knew that you guys would be the ones to ask!
My current mixer is a stage mixer, rather than a DJ one, and it's been very useful for karaoke, but not so good as for DJ work. I have to send all the output from my laptop to just one channel (stereo fortunately), and there is no PFL/Monitor function on it. It is a superb mixer for karaoke and live performance though, so I'd like to keep it.
I've seen a great mixer for sale, 4 mic channels, 4 line/phono inputs, 1 master mic input for DJ, separate equaliser for both stereo channels (l/r), and most important, pfl on each channel.
I'd just like to know if it is better running Cross through an external mixer, and apart from the pfl and a dedicated channel for each deck, what advantages there might be. Or any disadvantages? Is there any impact on system performance when using an external mixer?
Also, would it be possible to still use my existing Mackie mixer purely to control the microphones, and connect it to one of the line inputes on the new mixer? I know that the connections are fine, being phono/rca, but I'm not sure if there's any issues running one mixer through another?
Sorry there's so many questions in there, but I knew that you guys would be the ones to ask!
