Greetings CpTChucky,
You have a very doable TVfool plot. You are served by a cluster of translators at magnetic 249/250 that provide you the Salt Lake broadcasts.
Translators are basically low powered repeaters of full power signals. They are a double edged sword however. While you have access to the Salt Lake broadcasts the low powered nature (some running 140 watts) of these translators mean an attic mounted antenna or an indoor antenna isn't going to be a good choice. The reason being that with such a low broadcast power these signals will not have a lot of "punch" through solid materials.
Thus, it is suggested you mount an antenna outdoors above your roof either via a tripod, eave or chimney mount. Mounting supplies:
http://www.solidsignal.com/cview.asp...ing%20Supplies
Further, all the translators at magnetic 249/250 are of the UHF frequency band (real channels 14 and up) which makes this a single antenna solution. As such, I recommend a
Winegard PR8800 8-Bay UHF antenna orientated to magnetic 250.
http://www.solidsignal.com/pview.asp...a-%28HD8800%29. The reasoning for this recommendation is twofold: first, as a stronger, higher gain UHF design it ought to give you plenty of signal to send feeds to two TVs. Second, it's excellent pricepoint.
You do have some other signals available at magnetic 200 and 196, one of them being high-VHF (real channel 12). For the purposes of this recommendation, I haven't included the magnetic 200 and 196 signals. I wasn't able to find much info about either of the non-translator stations. If you want these signals, a second antenna would be my suggestion. There are also a bunch of translators at this heading repeating the Salt Lake broadcasts, but they are in the very weak category. I won't say too much more unless you want to discuss the 200/196 signals more.
How many TVs do you intend to feed off the antenna? How long do you imaging your coax runs being?
Overall, the Winegard PR8800 ought to serve you nicely and provide reliable service of all the signals from magnetic 249/250.
Cheers.