hi shelly, in replying to the core of your question: "Basically what I am asking is: If I am wanting to develop my skills to make myself more marketable which is the best route to go?"
In my opinion, there's basically going to be 2 mainstream of web-based programming you need to stick to for "marketability" sake.
1) Microsoft asp.net
2) PHP (LAMP Stack)
Both are very dominant in the marketplace. Be very good at one of it and you won't go wrong as far as "marketability" is concerned.
Not to say others are not significant, like Googlers, they like to use Python, or some hard core stuff like LISP you probably never heard of.
Coldfusion doesn't look good in the long run, Adobe might stop further development anytime. And not to mention, coldfusion shared hosting is normally cost more than linux and windows hosting.