As far as I can see there are pro's and con's to each side.
The pro's of tubs are that they are cheaper (in some cases) and that they are usually lighter. Also as has been pointed out there is the over heating issue while descending Alpe d'Huez.
The pro for clinchers is the convenience of easily being able to fix a puncture by the sire of the road without the need to carry a spare tub.
Weighing up the pro's and con's for both, I opted for the wheel that I felt was right for me and in this instance it was a clincher.
I live in Suffolk, so finding anything close to an Alpe d'Huez descent is quite on the tricky side, so overheating isn't a concern to me and my riding is pleasure rather than racing, so I do value the convenience of easily being able to fix a puncture by the side of the road.
We have two young children, so if I phone Mrs O to be collected due to the result of a puncture, I suspect I would hear her fall to the floor in a fit of laughter before reminding me that her answer was no and that it was my own silly choice to go out on the bike. That said, I have had a single puncture in about 5,000 miles of road riding and that was at the top of the road in which I live, so a quick walk home and a fix in the garage (and that was in the wet).
I will not rule out tubs, but not for this bike. Maybe I will get some for my TT bike, the only issue being that I need to buy the bike first...