Have a 30' 2003 Alumascape TT. Want to put electric fireplace under TV in entertainment center. Space opening is 20" high, either 17 1/2 or 23 1/3" wide (depending on if spacer panels are removed). We looked at DImplex DFI2309 but it doesn't have the glass and front framework. What experiences do you have that can help us with locating a suitable alternative? Cost? Other related concerns or issues? BTW, 120VAC outlet is in the entertainment center. Thanks in advance for the help.