I've tried Clonazepam, Alprazolam, Phenazepam, Etizolam, Diazepam, and Lorazepam (on that at the moment, and about to light up a bowl, actually!)
It seems that everyone has different preferences.
I found Clonazepam and Phenazepam to be of little interest recreationally with weed (though a bit of either + alcohol helped potentiate the effects of the alcohol without potentiating the hangover, but that's playing with fire, and it's not fun enough to persue further. ).
Xanax is fun, particularly mixed with weed. Etizolam and diazepam are my favorites though, and i usually go with diazepam. It's so relaxing and comfortable. and you feel chilled out the next day too, but more gently.
Lorazepam + weed seems different some how. both more euphoric, and more creative. I very rarely draw on any drug, but on lorazepam and weed (have never done it without weed) i often draw things. Not very competently, but i end up with drawings. I find lorazepam generally more fun as well. while most people seem to prefer other benzos to it.
Everyone's got different preferences.