Lately I have been looking for a tube amp in the $100-300$ range.
I have looked at the fender Champion 600 and Vox AC 4.
Any Suggestions?

Well $100 isn't going to get you very far in the tube world. The Champ 600 and Vox AC4 are your best choices. $80-$100 seems to be the going rate for used ones.

Try one of each. Do you like Vox or Fender tones better? Even though they are little they still kind of have the classic Vox or Fender tone. I've had the Champ for a couple of years and am kind of bored with it. The Vox is more versatile in my opinion.

I would suggest scraping together $200 and getting the VHT Special 6. Much better quality and tones available.

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Obligatory gear list: Fender, Rickenbacker, Gibson, Gretsch, Vox, Martin, and more Fender.