Terry_42

Sorry we are digitaldjtips and hence cannot make recommendations on outdated products.
You kinda summed it up yourself and there is no better, you have to make up your mind on your own on that old stuff.

THe DDJ RX is not standalone.

Oddity said it perfectly I have to say.
You might want to fix your computer problem and stay with the S8 if that is comfy for you. No rush to learn something new.

First choose your software.
Since accurate beatgridding seems important to you, also on tracks that can be “off” your choices are limited to Serato and Rekordbox, whereas I find Serato a little more intuitive. Other options would include Cross or VDJ, but they have a steeper learning curve with those controllers and DVS.

Now that we have that out of the way I guess you will want to go Serato or Rekordbox.
They are both very close competitors and look really similar, so either will work for most people. I prefer Serato solely because of Flip and TonePlay which Rekordbox does not have, but those are more expert features.

Nevertheless from the controllers you then are into the Pioneer RX or SX2 which both have standalone mixer capabilities and also support DVS. Controllers you did not mention that also can do this are the Denon MCX8000 (which is what I use) the DDJ-SZ and those are the ones from the top of my hat.
None of those support iPads.

However if you daughter is just wanting to play around a bit, you can get something like an old DDJ-WeGo, reloop Beatpad etc. in the used market very cheap (100 bucks or less) and she can use djay on the ipad which is great fun.

Hello and welcome, have fun!

That is actually uncorrect in most clubs you will only find RCA to connect to the house or PA mixer and for home studio use RCA is also fine and you can spare the DJ mixer. Also there is nothing inherit cheap about RCA, it depends on the manufacturer and you can also get cheap XLR in a 50 bucks Chinacontroller that sounds way worse… but what do I know I have only DJed for 25 years, so you might have more experience than me 🙂

Nonetheless if your heart is set on the A6 by all means go for it however the Turntables you posted are utterly bad. Honestly the RP-7000 is as low as I would go that is why I recommended the AMX, save money on the mixer side go for a full solution and invest in good turntables.

Now turntablism is a lot about hip-hop and hip-hop (even high class produced) is not always beat correct (aka BPM will vary slightly through the song), this is why we recommend Serato as it has a so called flexible beatgrid. Traktor only has a hard beatgrid and will not do so well with these kinds of music, but whatever your mind is set on.

However you still will need somekind of controller with Traktor if you want to use some features and not always click on your laptop to load things (which looks kinda unprofessional) so one of the NI addon controllers will still be needed.

Honestly I find this mix very good and most songs in it are really cool!