I first used a paper towel to clean the inside of my tank and just ran it across the glass. I got tired of this, though, and decided to use a toothbrush. It may be more tedious, but overall it's easier and more precise.
As for cleaning the outside, you should be able to use whatever you want. If you're using a spray, such as Windex, be sure to spray it on whatever you're using to clean the tank with first and not directly on the tank itself. You don't want any chemicals making their way into your water.
Wow, I was focusing entirely on the method and not the effects on the tank itself. I have a glass 10 gallon tank, so obviously it will not be scratched by a toothbrush. As for your acrylic, I guess the methods I use wouldn't carry over so well.
I'm not familiar with the acrylic cleaning pads you've mentioned, but if you're wary of them it's probably best to stay away. What about just a regular sponge pad? Like a kitchen sponge, but larger for more coverage and without the abrasive padding on the backside.
Guess I'm not so much help, but that's my fault for misreading your post.
That's alright kittles! :) It seems that the majority of people have acrylic, so I'm not sure why anyone hasn't replied with their method yet. Glass is, by far, easier to clean.......but I can't find any small hexagons in glass. :(