FTE Jerez has a ‘flight deck plus’ program for PPL holders with 150+ hours and their ATPL written exams passed.
If prestige is important to you, then this is about as ‘top of the line’ as I would go.
Remember it’s not where you start your flight training that counts.
It’s where you graduate from.
The same goes for CTC/L3.
I would only go there for a A320/B737 type rating.