That angle one is probably the better of the two. The only downside is that it doesn't say if it is dual action. Unless you are experienced with a straight buffer you can easily burn nasty looking swirl marks. The dual action machines are much more forgiving. Even the Harbor Frieght d/a works pretty good. I have a Griots and love it. I think autozone carries that brand.
Another rookie mistake is thinking that lambs wool is a nice soft pad, it isn't. They are suprizingly aggressive, mix that with a non dual action polisher and you can do some real damage.
Maguire,'s has a forum you can learn alot from, plus some pretty decent products. But beware you may be headed down a very deep rabbit hole! Just remember the smaller the machine both in size and amperage, the longer the job is going to take.
Good luck and remember" pics, or it didn't happen "!