Personally, when dealing with electronics of any type. I always find the best place to start is your budget.
The sky is the limit with features and technologies you can buy and use, the largest limit to making this happen is always how much you can afford.
From there you work out what you want you system to achieve or do. Are you looking for a home cinema experience, or movie/music jukebox/storage setup. Or just a TV and a 'box that plays stuff'.
Next I guess are the less fun things like;
- Room/space (where will it all go. does my 2 bedroom apartment really need a 50" plasma)
- Time (do you want it all now or are you happy to build your setup over time)
- Info/Skills (what do myself, what will I need help doing)
So yeah, more info please
