Antenna Joining Advice with HDHORIZONX10

Last week I picked up the new HDHorizonX10 and so far I've been pleased with it. I went out of town last weekend to a cabin in the Tennessee mountains that had very poor AntennaWeb & FCC Map projections, but I was able to pull in all the local channels with the x10. Now that I'm home I'm looking at using it to improve my home setup. I live between two DMA's (actually closer to the one I'm not assigned to than the one I am, go figure). Right now I have an 8 bay antenna pointed at the Charlotte DMA, but still get some of the channels from my real DMA off the back side.

Since the X10 uses a 60 degree beam width I've been considering replacing my 8 bay with two of the X10's (one pointed at the GSP dma, one pointed at the Charlotte DMA) to pull in both. Would this work, or would the X10 exhibit the same back side reception I have now with the 8 bay. Would I be safe to try combining the 8 bay and the X10, so long as I located them far enough apart? Two of the stations in the GSP DMA are High VHF, the rest are UHF. I considered stripping out all the VHF signal from the Charlotte pointed antenna as well, to help cut back on interference on those channels since they are the strongest "back side" channels I get now. None of the other channels from GSP come in clearly except for the two VHF ones currently.

Anyone have any input?

Here is a map showing where the transmitters are in respect to my location from the FCC site.

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