Hello DJ Tech Tools

I'm new to the forum - only my second post.

I've been DJing for quite a few years now, and have been running a fairly basic setup.
2 x Technics 1200 mk2 :-)
2 x CDJ 200s (now replaced with the significantly better CDJ350s, which I really rate)
1 x Gemini UMX SE Limited Edition Mixer
Marantz amp
Wharfedale Diamond speakers

I'm planning to upgrade to a new mixer, and need your input!

Here's roughly what I want
- 3-4 channels, each assignable to the crossfader
- All channels to have LED indicators
- Decent crossfader for scratching (I'm not very good, and rarely practice, but planning to get my sh!t together soon)
- Good sound output
- Booth or record output, or perhaps a onboard soundcard with USB out for recording
- Under £400 ($520)
- I'm less bothered about effects, but a nice set of simple effects would be fun

I was going to go for the Reloop RMX 33i, which looks lovely, but it's third channel isn't assignable to the crossfader (which I may have been able to live with) and doesn't have LED indicators.

I welcome any suggestions, inspiration or questions!