one pair of polk audio db651 or db650, 4500rs
a second hand small 2 channel any amp, 2000-3000rs
i used innovation 50.2 amp, got it for 2K, solid audio F23 also does the job similarly.
u can get pioneer, alpine speakers easily in 4500rs aswell.
if u wanna go higher in quality, get component speakers, they will cost u atleast 8K rs of any brand.
u can and should use stuff other than kenwood
infinity speakers are also very good sounding.
jbl is another brand u should look at.