Thanks for your responses everyone, much appreciated. I'm surprised at the number of times 6-APB has been suggested. I think it's sold here in the UK under the name "Benzo fury" but despite its similar chemical structure to MDA, its been getting bad press. What does it feel like?
I'm quite keen on the idea of LSD on its own - I'm happy at the moment, no reason to worry, not anxious, good friends etc and I feel generally very good about life. But surely if I'm "nervous" about how the experience might turn out, that would increase the chances of a bad trip. Either way, MDA sounds like the perfect solution to my little quandry ;-)
Happy christmas!