@FaheemAsif
Sir Class D are purely for SUBS, unless you got for HIgh end 500$ (50K) Plus full range D class from Pioneer PRS or other brands.
@FaizyBaba
Sir 5150UB is the previous year predecessor of 5250SD with almost same features but minus SD card support, inferior sound quality and display.
If you are getting the 5150UB for a low cost, lets say for around 10-11K go for it, else stick to 5250SD.
Pioneer D6902R speakers are MUCH better then Kenwood 715, if you can afford them, JBL is also top of the line AMP, 4 channel AMP can also support a SUB in future.
For 2 channel Kenwood 5203/5204 are best, will cost you 3-3.5K Rs.
Regards