Good advice to think about buying for solo. That will keep lesson costs down and make booking easier. Nothing wrong with a flash 2. They got a reputation they did not deserve from people who never flew them. They get better as the wing gets older. Alpha good at a little more cash. The XL is a bit slow as is flash 1 but if you want to fly fast you are in the wrong sport. Unfortunately some instructors think more about money than students so advice from independents is worth looking for If you dont know much, make friends with an inspector.
Think about support, who can fix it? Can you get spares? (that means Mainair)
Gerry