Newer cars have an Immobilizer which requires the key to be in the vehicle to start it. The after-factory starters for them tend to require that you mount a key in the car to bypass the immobilizer, which of course makes the car easier to steal... I would expect your Stratus to have an immobilizer, this page says they were equipped from 1998 onwards, but it sounds like it is an immobilizer bypass: Remote start bypass applications
If you want long range, I would think you want a two-way, because then you can be sure that it's started.
Then you pretty much just need to pick one of the available remote kits. I know there are a lot of them out there, but you just need to take a look at the ones with the features you want and pick. :-) Maybe try a search for what other Stratus owners have had luck with? I liked the look of the results searching google for: stratus "remote start"
If you aren't going to install it, you probably want to pick your installer, and they'll have ones that they prefer to work on and can make recommendations based on that.
Personally, after looking at the available options, I decided to just forget the remote start. I didn't like having to bypass the immobilizer...