A humidifier is a good idea. I was going to get one but I found that, by covering 3/4 of the screen with a nice opaque material (I use a cut-out piece of a trash bag), a large water dish with a wide surface area and using a heating/lighting rig similar to the one you described I get good humidity levels without misting (60 - 65). It works pretty good.

The trick is to keep it consistent, especially with the humidity because you don't want it to drop too much, or all of a sudden go way, way up into the 75 range; which can happen sometimes with the misting. Don't get me wrong, misting is a good idea and stuff, the problem I had was when some of the water lands on the glass and evaporates faster than the water that lands in the terrarium it's self ... I liked the large water dish idea as a substitute, and my red lamp heats it up enough to facilitate evaporation while the trash bag sgreen cover makes for a good "green house effect" keeping a large part of the humidity evenly distributed in there.

Concerning your temperature, make sure you keep an eye on how the temp. of the room affects rises and drops in the terrarium temperature. You'd be amazed what weird things can happen to the temperature in the terrarium when you use the AC to keep a room at 75 degrees versus using the heat to keep the room at 75 ... in my place at least. It was strange. Dimmers can help with that.

Anyway, I am a new BP owner too and I think its cool that you got into it. I hope your experience is proving to be as fun and rewarding as mine has been.

Take care.