Don't treat cameras like commodities, unless you are a professional (a photographer by profession), it will always be an expense. However if you are going to buy a lot of accessories (I mean a lot), the practical things to look for will be:
After sales services, repair cost, long term compatibility, sharing similar brand with your community hobbyists and price per use.
If you are one that is always doubtful, go for the high end models to cover all your needs. And if one is worry about being criticized for buying a wrong brand, then follow what your community buys.