nah man they would look killer, a lot of people have done it, a XRS is just a S with performance and suspension upgrades... if u search u can find some pic of it also...
Just remember, the stock Corolla XRS rolling radius is smaller than that of the Corolla S/LE/CE because of the low profile tires and to match the rolling radius of the Celica GTS so that the 6 speed gear ratios are not altered.
In order to keep your speedo accurate and overall gearing of the car the same, you will have to get 195/60/16 tires to keep the rolling radius the same.
You can calculate the tire size and speedo calibrations here: