Help needed from audiophiles to choose correct receiver for Polk Audio

[summasumma]

Can anyone please tell me if the following is good combination or any specific suggestion? My budget is 75k.

Polk RTi A1 - FRONT (15k)
Polk csi A4 - Center (13k)
polk PSW 110 - sub (13k)
Polk Tsi 100 - Back (10k)

With denon 1612 avr. (25k)

Can TSi100 in back do justice when combined with Rti series the front?

 

[summasumma]

heard demo yesterday in chennai profx but only with front spks...
the combo i have mentioned is available for 82k... is it good combo and good deal? Any help....