My favorite tip changes ofter but lately I've been leaning toward Tiger Onyx, which requires a little break-in period, but they seem like highest quality tip I've used and installed.
The tips that I am leaning toward, and I don't know how they will be marketed, are the 5 & 10 layer tips that Chris Byrne developed.
Brown 5-layer.....S-M-H
Brown 10-layer....S-M-H
Black 10-layer.....S-M-H
The soft are soft, the mediums are medium, and I haven't tried the hard.
The 10-layer black soft had a really nice sharp hit for a soft tip, and the medium was just a little harder.
Nicely made tips, and the blacks seem to have a very good dying process.
I also think that the 3-4-5 multi-layered tips are getting popular in a big way.
Chris's 5-layer tips aren't as tall as the 10-layer, but they are some of the best tips I've tried, and not as hard as Tiger Dynamite.
Other multi-layered tips like Madman and Hirano are probably very good, but I haven't tried Madman.
For milk duds, pooldaw8 "Dawg Duds' are the best I've tried, especially for what he charges for them.