Which intrument should i continue with or learn next?

i play the piano, flute, euphonium when i was in pri sch and a little of violin last time, got my grade 5 theory. I was wondering should i get a flute for myself (expensive cause if i want to buy one i would like a miyazawa). But i also like to learn another string intrument like either relearn violin or learn cello. I know it's difficult but i have got lots of time to practice now, i think that violin is too common but cello is quite big to carry around so i don't know which one to pick up.