Should I get the Galaxy S3 now or wait for the LG Nexus 4?

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http://androidforums.com – currently using a HTC Desire HD and i'm antsy for something new. should i grab the S3 or wait for the Nexus 4? the supposedly more powerful processor of the Nexus is appealing to me, but the 16 GB storage cap is kinda turning me off. then again, it'll likely be cheaper on no contract, which is what i'm going for your advice? (General)