If you flat often clinchers are easier to change (not using the sealant option) and a tube costs less. These days the best repair option is a cell phone and friend, parent or spouse. If you don't have those then there is good reason for clincher.
Equal weights - (rim and tire), tubulars will flat far less. A Roubaix tubular weighs about what a weight weenie clincher setup weighs. That is rim, strip, tube etc.
So choose the tire wisely and you will likely have a better experience with the tubular.
Go for a sew-up - one with thread and latex tube.
Veloflex, Vittoria, Continental (not Tufo) etc.