One word of caution with an SA licence is that it is TYPE RATED.
If you learn on a C150/152 you can only fly the same type until you have conversion training and pass a 10 question exam set by a SA FI.
The conversion training can be done by a JAA/CAA FI but must signed off by the SA FI.
There is now one SA FI in the UK, he works out of Popham I think.
Not particularly onerous but something to take into account.
JCL