Why not take one step to begin with... The HD1080 or the FV HD30, also Winegard.
Facing about 160°, mounted in place of the rotator in your picture, you may be pleasantly surprised. you can then decide if you are missing stations important to you.
Do you have any desire to build an antenna yourself? If so, look at
http://www.digitalhome.ca/ota/superantenna/ look at the single G-H, omit the reflector screen so that you would get reception from the front and rear of the antenna. Also,
http://m4antenna.eastmasonvilleweather.com/index.html with a focus on the 9 1/2" whisker 4-bay, omitting the reflector.
And because JC mentioned it, I think it's a good idea to ground properly.