2 way, which are the best designs?

dweller +1

Love ATC active.  

http://atcloudspeakers.co.uk/professional/loudspeakers/scm20asl-pro/

Its true though. Anybody could have tapped the egg and stood it up. Same with building speakers. In fact Im not even suggesting you get out a saw and start sawing. You just get a cabinet maker to do it. Which is probably the same thing some speaker companies do. 
Even the cabinet size is done on a computer simulation. Same with crossovers. Its not rocket science. Its just laziness that prevents people. 

There is a saying "If you owe me $100 dollars, it's your problem.  If you owe me $100K dollars, it's my problem".

If you argue with Kenjit, I wonder whose problem that is :-)

'Best 2way'...hmmm....MHO, mine.  No boxes, either....

But I'm hopelessly biased....*G*

OP, if you’re used to an active 3-way there’s no way back :-) Standmounted 3-ways are for me the most interesting speakers today.
Try the ATC 50, 100 or 110, Quested v3110, PMC IB2i, IB2SE, Kii 3, Dutch & Dutch, Sp Acoustics, Geithain or similar. Quested being a little (100 pounds!) favourite for me..
If you still want a 2-way you have the active ATC20 and the Quested v2108. Any 2-way passive or active will naturally need subs if you'd like to feel the bass.