Thanks all for your replies, I will split mine in two (camera+lens and egypt)
I am going in mid Jan so I have little more than 2 months.
About camera and lenses :
-> Based on everyone's reply I am not even thinking about 24-70 II... and that means 70% of my problem solved... for some strange itchiness, I think I was bending towards that direction earlier... but it does not make sense to me now.
-> I am currently based out in Hong Kong so BH may not be a good option and refurb lenses it seems are not available here . Over here, used market is pretty active but most of those forums are in chinese and not expat friendly (translation in english )... but I am taking help of local friends.. so hope to find a good deal.
So Far, below is what I am thinking :-
24-105 (hope it will be upto its reputation once back from canon service)
24 1.4 II or 50 1.4 or both (confusion stays)
17-40 or 16-35 II (not confusion but I intend to buy used one and whichever comes first.. If 17-40 then I think I will carry my 24 1.4 II, though I am trying to follow 16-35 II ads first)
70-300 -- Not sure about this one.. if 24-105 continue to disappoint me then I will leave that behind and carry this instead... making it look cheap with tape is a good idea indeed
430 EX II - wont carry this inside monuments, its not allowed anyways. It's more for other occasions.
S110 or S100 or xyz - gift to my wife (I tried sticking my old trusty 550D+15-85 in her hand earlier...but boy... getting engineering degree was easier...her only interest in photography is how good she looks in a photo
* Good suggestions on weather sealing...other than 50 1.4 others are weather sealed with filter so I should be fine I think (if changing lenses kept to minimum).
* I will read some articles and go through videos on cleaning sensors etc.. have never done myself.