| I have multiple sets of D7s, D10s, D12s and D18s.
The D7s are used for all weenie dives, shallow, short, no deco etc, and are used often in all the local mudpuddles I dive in.
The D10s are used for deco dives where the ability to move heavy doubles is limited.
The D12s are used for everything shallower than 80M, I can pump them high enough for a 20 minute bottom time at 75M. Carrying them is OK, but many other things are more fun than trying to climb over 30" steps with D12s.
The D18s are only used when the dive requires them, in the water they're great, but I stay in the water longer because I'm dreading having to climb out wearing D18s. Out of the water they are a bear, and I hate them until I get back underwater with them.
In other words, get the D7s, and enjoy them! If others are diving single tanks, you will be disadvantaged diving D12s. Eventually your diving might change to where you need D12s, at that point hopefully enough time has gone by that the expense of having 2 sets of doubles is not a concern.
Michael |