A ball head will be much better because its so much faster to set up the way you want.
If you're seriously into landscape and macro... you don't want a cheap tripod/legs, people keep saying that, but its true, especially for landscape, where you'll be using long exposures and where the slightest wobble or vibration will ruin the picture. The tripod and head are as important as the lens. Don't skimp.
If you buy a $70 head, you'll likely find that it sags, and you'll get annoyed at it, and end up buying another one, then you'll have spent more money than you would have if you'd bought a good head in the first place.
I recommend you at least try to double your budget and get a decent head, because a tripod and head can literally be a lifetime investment, unlike other parts of photography such as the body, which you'll upgrade in a few years time.
For $140, I'd highly recommend this one:
http://www.bhphotovideo.com …nesit_MB4_1_Ballhead.html
HOWEVER, if you absolutely cannot increase your budget, and HAVE to get a $70 head, then you could take a look at the horusbennu stuff, they're cheap and get good reviews, and are rated to support quite heavy loads. The LX-2T is around $70.
Or if you want to stick with better known brands, you could try this one from cullmann (I like cullmann, a LOT, they have the best customer service I've ever come across, and their products are simply great, even though they are not so well known compared to others like manfrotto, gitzo, RSS etc...):
http://www.bhphotovideo.com …_CB7_3_Ballhead_With.html
Or this manfrotto one:
http://www.bhphotovideo.com …2_494_Mini_Ball_Head.html
