Quality brother,always go for the top shelf if you can,although it does really depend on you and what u consider important,like smoothness or flavour.
plus if u havent much spare cash it might be wise to go for the cheaper option to get more out of it untill you can get some good.
a nice balance when u got more cash is buy a bit of each and bulk up with the lesser quality while laceing with the more potent buds.
If your about taste though u probably wont want to mix em up,like i said depends on you bro
now go get high as a motherfucker already