I need to replace a flowering dogwood that was diseased. I want to replace it with a bush/tree that is 4'-6' with a 4'-5;spread. I'd like it to flower in pinks or purple shades and possibly have berries in fall (but not absolutely needed.) It is in front of a fence, so although that direction is west, it will be part shade because of the high fence (5'). I live in zone 6a. Any suggestions?