If ya got the space to deal with the males then yea go for it. seed is cheaper.
If not then go fem seeds. In my experiences they have produced fine females about 90% of the time.
Yes fem seeds are worth it.. Theres always a 50/50 chances in a 10 bag seed that females will come out.. so why take the chance, just buy the 5 seeds... you buy 10 regular seeds chances are there going to be more males then females. but if you can get some clones that would be better