Here is a site have some info about T4i and T5i, if you are interested, check out the details
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Just looking at the sale prices on these two cameras.
The T3i is available for $600 with 18-55, thinking this might be worth buying.
In comparison the T4i is available for $850 with 18-135.
I'd like some opinions whether it's worth starting with the T3i and spending the extra on lenses.