I was faced with a similar choice. In the end I bought a Colibri
because the main problem with my LX5000 was that it is old and non-IGC
approved. The cost of the Colibri was cheaper than the conversion once
shipping was added on from South Africa - and I have the added
convenience of being able to remove the Colibri from the cockpit for
scoring etc. The LX5000 is then a non-IGC backup in case of Colibri
failure. I also didn't want to be without my LX5000 for the period that
it would have been away for the upgrade. Now I only take my laptop to
the glider every couple of months to dump the memory of the LX5000 to
keep a full record of the aircrafts flights.

Clinton
LAK 12