Thank you for everybody's input, it has really given me food for thought. I will add a few extra bits to the argument though.
I am not interested in changing brands - not to say other brands don't have fantastic set ups, it is just I have invested both time and money in the canon brand over the years - both in lenses, and learning the 50+ menu options canon bodies have. I am just getting too long in the tooth to start over again.
I am also not interested in compromising in quality of the lenses. As stated I approach every opportunity as my only opportunity to take the shot - the kits needs to be reliable (and i need to be familiar with the equipment). I have already invested in quality lenses. The focal range needs to be covered and I already own a good range of "L" lenses.
Secondly in order to have the perfect travel kit you need to have it available and on hand when you travel. It does not have to be the entire arsenal you own, but I believe it should be 90% ready to walk out the door at anytime. You could be using it for other purposes but you know if you were hiking to Mt Everest base camp or sailing down the Nile in Egypt it would essentially be the same kit.
I also say the general travel kit. I stated I am a tourist who takes photos - I have not gone on a specific photography trip. Now if I did, I think it would be a different situation. If my prime purpose was to photograph lions in South Africa, or polar bears in Alaska, then I would hire the specialized equipment for that particular "expedition". Now if I was a tourist who spent a couple of days in Kruger National Park hoping to see a lion, then I would not need a specialized kit. In fact I have photographed lions with a P&S in a park next to Kruger - the pride was no more than 25 metres from our truck.
For those of you who say there is no (near) perfect photography travel kit - I disagree. I have traveled enough over the years to have my clothes packed in minutes. The only difference in back packing in Cambodia and trekking in the Himalayas, is I lose the sandals and throw in some good walking shoes and light weight down jacket. Everything else is exactly the same kit. I want to do the same with my photography kit
Given all the above I will admit there are some great suggestions in this thread. Over the weekend I went and tried out both the SL1 and the 6D. I like them both (a lot). In my original thread I listed what i thought could be the perfect kit, but I have revised it based on the below reasons (lets assume any brand equivalent - I have already stated my reasons for Canon):
Canon 6D - full frame which will mean I can use my 16-35 rather than purchase the 14mm I had planned if I used a 1.6x crop. Although heavier than the SL1 (which is insanely light) - it is lighter than my current 1DIV and still lighter than a 5 series.
Canon 16-35 f2.8 II (i own it already) and on a full frame will suffice me for inside temples and churches
Canon 24-70 f2.8 II (I own it already) and a great mid range focal length on full frame, (so sharp I could use it to peel an orange).
Canon 70-200 f4 IS - Now this is something I need to purchase, and the jury is out on this one. I have found I have never really missed this focal length when i travel on the 1.3x crop, but it may be a factor if I go full frame. Either way it is light and weighs less than the 135 + 1.4x I had originally planned. I have the 2.8 version but it is too heavy to travel with.
As it sits this kit weighs less than 3kg (6.5Ibs). If i drop the 70 - 200 lens, this kit would weigh around 2.2kg (under 5lbs). Add a small flash and my P&S back up and I think I could cover 99% of my travels and not regret my decision.