1. Decide your Budget. (X)
2. Find out latest DSLR Models in the range of 0.8X - 0.9X (In the range of 20% less than your budget, because usually budget increases as you take final decision :) )
3. Think of Features you need and compare those features in Canon & Nikon or other brands you are looking for.
4. It should be enough for deciding, but following factor can further help in better decision for long-term.
- Lenses you may buy in future : prices, quality & which camera bodies support those.
- Post Sale service of different companies in your region.
- Value added services offered by dealer or Camera Manufacturer.
