What to do?

[Anthromn]

Camera: T2I
Lenses that I currently have:
Canon EF-S 55-250mm f/4-5.6 IS
Canon EF-S 10-22mm f/3.5-4.5 USM
Canon EF-S 18-55mm f/3.5-5.6 IS
Canon 430ex ii flash

Should I buy:
Canon EF-S 18-200mm 1:3.5-5.6 IS
Or is there something else?

*I would try to sell *the 18-55 & 55-250 if the 18-200 was bought...lost money isn't an issue

I travel a lot and will be going to Thailand/Cambodia on my next trip in March

[TCav]

There isn't one thing that the Canon 18-200 is better at than the lenses you already have.

[deterpawson]

hello
maybe a better option would be to trade the 18-55mm ( which it think is pretty good value ) and the 55-250mm which focuses rather slow for a tamron 18-270mm which is stabilized, and also can be used as a leave on.
make sure you take the 10-20 for landscape and city shots.
enjoy your trip.
cheers
pete

[corkpix]

Welcome to the forum.

Originally Posted by Anthromn

Should I buy:
Canon EF-S 18-200mm 1:3.5-5.6 IS

No.

Or is there something else?

Maybe.

*I would try to sell *the 18-55 & 55-250 if the 18-200 was bought...lost money isn't an issue

The Canon 18-200mm is not one of the better zoom lenses. As TCav has already
mentioned, the two kit lenses you already have are as good as or better than
the Canon 18-200mm.

Is there a compelling reason to buy a superzoom? If so, the
Tamron 18-270mm and Sigma 18-250mm are probably the best
lenses in this class.

If it was my money, I would buy a higher quality lens with less
zoom range. The Canon 15-85mm IS USM is one of the best available.

I travel a lot and will be going to Thailand/Cambodia on my next trip in March

Enjoy the trip. Don't forget to post some of your photos when
you get back home.

[wave01]

Hi all things considered are you trying to get a one lens solution for your trip