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Q1. Generally yes, unless you are talking about extraordinary cable lengths. Outdoors is better than in the attic, but how much better depends on the composition of the roof. Rule of thumb, don't use an amp unless you have to. If you do, don't use too much gain. They can be a real curse if you have strong local channels or any kind of radio transmitter relatively close. Unless you are in the boonies, the overload capability of the amp is probably more important than the gain or noise figure.
Q2 Yes you can. Depending on various factors you might need a distribution amp to overcome splitter loss, but if its only split once you may be OK.
You will be better off with a rotator.
some channel allocations will change in a few days, the frequency for CBMT has already switched to 21.
I'm going to put up a new antenna and will probably use one of the Antennacraft antennas and possibly their amp.
Have fun... and don't fall off the roof!
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