Slow dog, going with two antennas is better, even though some like the DB4 & DB8 will pick up high VHF (7-13). Because of foliage on our trees between my house and the antenna 8 miles away, I have found the signal dropped 8 points from where it was, when I originally put it in my attic. Using that as an example that you need to recheck your signals after the trees start defoliating and adjust accordingly to raise the signal on that one tower you are using the one antenna to receive, just like I did with my setup.
All I am using is the AntennaDirect DB8 and the AntennaCraft Y5713, and Channel Master 7778. In your area, you may need the Antennacraft Y10713 for high VHF, and the Channel master 7777. If you can find a local antenna shop that could let you try different pre-amps, that would be better, or just order both from Amazon.com, then return the other that does not work for you. I have done that with stuff, when trying to find the right option, and it is easier to order a couple items for the same job, then send back what you are not going to use.