Qiyi Xman Spark 7x7x7M
The QiYi X-Man Spark M 7x7x7 is the best 7x7x7 on the market, it is fast and smooth and is used by essentially all top 7x7x7 solvers, including the owner of this store who came 2nd at the UK championships with it.
I live in Ireland and shipping didn't only took a few days. OOTB this cube was a little sluggish, had lube on the surface and the box was a bit beaten up and dirty, although once i cleaned all of it off i noticed how nice the cube feels. the factory lube is ok, but i recommend putting a few drops of silk into each of the layers and break it in and the cube gets really nice, I can't put it down. there was a problem where the 2nd inner layer turned with the outer layer which was a bit annoying but that problem quickly went away after adding silk. also this cube does lock up occasionally if you don't turn accurately, (like with every decent 7x7) but most lockups can be resolved pretty easily and quickly. I also didn't have to play around with tensions and the cube is currently about perfect for me.