Like Sydman said, your frustration is, without doubt, justified. Like patmw said, you could go back to your dx2 while you decide which phone will work best, sell the SG3 and use the $$ towards the phone you are confident will work.
On the other hand, for me, it would be difficult not having the phone I thought I bought. My son has the rezound with the extended battery. I just upgraded it to ICS and did 2 FDR's. His phone really has been flawless and so far so good after the ICS upgrade. Maybe try that out at the store to see what you think. My Maxx has also been flawless but there definitely have been some duds with the Maxx.
Here is a thread where people have chimed in comparing the two. Maybe it will help.
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