The Infuse is a great phone. I'm waiting to get a Note, love the tablet capabilities of it.Personally, I love cells made by Samsung so I'd have to go with the Charge.
If you are taking other suggestions, I'd look into the Samsung Infuse(Which you can get for pretty cheap now) or the Samsung Note. I had no problems when I was using the Infuse and the Samsung Note I just recently got and I love it so far.