Comparing Mares Nemo, Suunto Mosquito or D3

Hi, I'm fairly new to the diving world and I have been offered a divers'
watch as a birthday present. All I have to do is choose one. I really
need your advice.

Currently my income is such that free-diving is by far the most common
thing I do, but I don't want to get a watch that will mostly fall short
of my needs should I take up scuba more seriously in the near future.

My initial research has led me to believe that the Suunto D3 is the best
value watch for free-diving purposes, however their Mosquito watch also
seems to have some free-diving features alongside scuba stuff like
decompression stops. Can anyone confirm for me that the free-diving
features of the Mosquito are just as complete and just as accessible as
they are on the D3 please? If so, I will rule out the D3 from the
shortlist.

Comparing the (Steel) Nemo and Mosquito is more difficult. They are
similarly priced and both claim to perform similar functions. I read in
a web forum somewhere that both have inflexibilities in how they allow
you to change mode (ie. between freedive and scuba, etc) and that not
all the information you might want is available in certain modes. These
are the kind of things you can't easily tell from the marketing blurb,
so I wonder if anyone with either of these watches can describe what
kind of frustrations or limitations I might discover in the actual
in-use behaviour?

For instance, is freedive mode more limited than scuba air mode? Can I
measure things like my surface time and submerged time in seconds at the
same time as seeing my current depth, water temperature, time of day,
etc, without needing o keep pressing buttons to change mode? Can I even
change mode while submerged?

How limiting is the non user changeable battery of the Nemo? I wouldn't
want to get an unexpected invitation to go on a diving trip only to
reach for my Nemo and find the battery low with no time left to get it
changed.

As a Linux and Apple Mac user, I do not have access to a Windows PC. Are
there any options for me to be able to download dive profiles or other
stats from these watches to either of my computers? If not, can I access
the data on the watch screen and write it down by hand instead?

Finally, are there other manufacturers and models of dive watch I should
be considering?

--
James Taylor