You'll be able to get to about 4.3 or 4.4v with the trustfires. You would be a little bit better served with the grey ultrafires getting to about 4.7 or 4.8v -- or, best yet, get some AW 14500s and have no voltage limitations up to 6 + volts.
I have a madvapes VV box and all of the above mentioned batteries. I am not at all fond of the trustfire 14500s (though I do like and use the trustfire 18650s in some tube mods - I just have no use for hte trustfire 14500s)