No, this is definitely the place to ask for help with this, and there are some very knowledgeable and helpful people here.
First off, it's good to go to tvfool.com and get a report of what you should be able to pick up from your home, and how strong those stations are. You can post that report here and get a more detailed recommendation.
Also, what markets are you looking to pick up fro your location? Cincinnati and Louisville have channels in the high-VHF range (WKRC on RF12 and WHAS on RF11), Lexington and Dayton are all-UHF.
The U4000 you posted is a great UHF antenna, and is designed for an outdoor mount. It does fairly well in an attic, but not well enough to get you the 60-100 mile coverage you're looking for. Also, the bow-tie antennas sometimes tend to have multipath issues in the attic, depending on the construction of your house.
Antennacraft and Winegard both make a combined high-VHF and UHF yagi antenna, similar to the older-style combination antennas but not as wide (since they don't cover 2-6 or FM) and thus, less wind load.
Antennacraft's version, which is all I typically install, is the HBU series. The HBU44 or HBU55 would be your best bet in this series.http://www.summitsource.com/advanced...ft+HBU&x=0&y=0
Winegard's version is the HD-769x series. The 7697 or 7698 would work for you in this case.http://www.summitsource.com/advanced...rd+769&x=0&y=0
I have found in my installs that these typically work better than separate UHF and VHF antennas, if you plan on combining the two into the same coax. Then again, every situation is different, and your mileage may vary.
If all you need is UHF, my recent favorite has been the Antennacraft G1483. It's not the most directional, but definitely yielded the most gain of any UHF antenna I've installed.
The Antennacraft MXU59 and Winegard HD-9095P are great UHF yagi's also.http://www.summitsource.com/antennac...le-p-6356.htmlhttp://www.summitsource.com/antennac...le-p-6337.htmlhttp://www.summitsource.com/winegard...le-p-4566.html
If you decide to do the separate UHF/VHF route, the Antennacraft Y10-7-13 is your best bet for high-VHF. You'll also need a good band separator (don't use a splitter, you'll lose 4dB gain), such as the CM 0549.http://www.summitsource.com/antennac...le-p-9259.html
Lastly, make sure you get a good low-noise preamp. Winegard and Channel Master make great amps.
I hope this helps, and feel free to post any further questions here!