Squan.
I use the YLM as i dont want to deal with it breaking as much but the MGC is the one to go for, assuming you are fine with getting a few spare cores.
7x7 :
Meilong v2m - small, cheap, and good, especially if modded.
5x5 :
Yh get the auchong or however you spell it
I main the single track and i find its really good, i do think the magnets are strong enough so i havent gotten the dual track.
Non - Wca :
2x2x3 cuboid - similar to squan and is alot easier tbh.
Ivy cube - easy and similar to skewb
FTO - Fto is Fto
Master Pyra - pointy.
Extras :
- Friends
- Life
- Money to afford this.
(The extras section is for both of us btw)