Personally, I hate UTM since it makes it difficult to work with data that spans more than one UTM zone. I usually prefer decimal degrees.
DMS Degrees:Minutes:Seconds (49°30'02"N, 123°30'30"W) or (49d30m02.5s,-123d30m30.17s)
DM Degrees: Decimal Minutes (49°30.0', -123°30.0'), (49d30.0m,-123d30.0')
DD Decimal Degrees (49.5000°,-123.5000°), generally with 4-6 decimal numbers.
Personally, I hate UTM since it makes it difficult to work with data that spans more than one UTM zone. I usually prefer decimal degrees.
I get my info from several sources and enter it that way. Then switch the settings to what seems to work at the time, the GPS does the converting.