Tubulars aren't realy safe IMO. Even if they are, riding a racing bike on them is harsh, don't see that you can use them under 7 bars. So unless for "racing", I go for clinchers. 700 x 25, not 23. One proponent of larger tires has taken the thing a bit far again IMO, claiming that 32's are faster or something, but riding a less from perfect road surface when you are on your last legs, you stand more chance of making it home on nice comfy shock absorbing 25 c's than on rock hard thnny sewups. Punctures on a clincher being hard to repair ? Yes, maybe if you are using some of those incredibly tight and hard to fit beadless 23 ones. Otherwise, carrying three tire levers (or the great plastic VAR tool, thx M !) and a spare inner, some glue and patches in case of multiple punctures is the saner option.

Tubs look great, and the spare attached with a leather clip strap (shortened) under saddle looks massively cool, but it's a choice. Prefer to look massively cool and ride gingerly (and on long rides with Brooks saddle end up with your rear end looking like a Baboon's face), or just ride without worrying, be able to put all your energy into the pedals, not use half of it to protect your butt by taking all the weight on your legs (at the same time pushing your shoulders out of their sockets).

Controversial, a load of people won't agree, just please don't shoot me because my personal view differs from your's. View backed by perso experience of how long it takes me to do a long course on good old clinchers, and the same course on rock hard tubulars.

So, conclusion, keep the tubs for parading the cafe fronts or bicycle meets, or racing if you are really that fast and fit that you can get an advantage from tubs, use the clinchers for regular riding. Tubulars are likely faster in experimental "tests", in real life they are a real pain.