Welcome to DC, Harrison!
You might find the articles at John Raven's Traditional Texas Fare
site of interest to understand the 3 forms of BBQ. There are other sites with good information, too - BBQ 101
and BBQ Basics
(some are better than others).
There are several good electric "smokers". Like anything else - you pay for what you get in terms of features like max temperature, temp and smoke control, capacity, etc. Cabela's
website has a good selection to give you an idea of what is available. Here is a Google list for electric smokers
where you can find other options (even instructions for making your own electric smoker from a trash can).