Who says White Widow is the best strain (just out of curiosity), 'cause I've grown a lot of White Widow and there are a lot of just as good, if not better strains.
For example: White Russian or Super Silver Haze, hell, I even prefer Northern Lights X Haze better than White Widow. White Widow has become a bit over hyped and over rated throughout the years in my opinion.
And just for a side-note; the original White Widow is now called Black Widow and all the seeds marketed under White Widow are F2 hybrids of the original White Widow (now called Black Widow) due to copyright reasons and legal ownership of the name going to the breeder and his seedbank.
Cheers.
P.S - As a home breeder I have to say, crossing a lot of strains doesn't give you all the qualities of each one, it just gives you the random dominant genes, which unless backcrossed, are unstable and therefore producing all different phenotypes with no stability and probably none of the desired qualities. It's a looooong process to stabilize the traits you want in each strain before crossing them again etc. etc.
One strain I plan on working on next year is crossing Big Bud with Haze, hopefully I can eventually achieve some stabilized offspring that will breed true throughout it's next generations.
I'm hoping I can achieve a strain that has the HIGH of HAZE and hopefully the BIG BUD will up the yield to a decent amount! Fingers crossed. Whoop!