Personally i don't like femmed seeds, but if you really want fems then yes give them a go. I'd be wondering why the seeds have dropped so much in price, maybe old stock which might not even germinate

Do you know what seed bank the widow is from?
There's loads of cheap strains out there that are good quality, you shouldn't have much trouble finding something.
I'd too say try skunk1, but i would try sensi's version or the flying dutchmans pure myself. Alot of people have good results with nirvana, i tried their cali orange and it turned out cracking