Yeah, I'd do the EZ snap thing if only required occasionally! Otherwise unnecessary extra weight to wheel in and out.
If it's a permanent thing and your adding on 30+metres then I'd go for the metal barb hosetail, especially if using warmer to hot water. Double 'o'clip it. If using cold all the time, I'd still use metal joiner myself, just due to longevity and strength, but you'd only need one o clip. Good luck.