I decided to establish a home cinema system.
I thought the JBL products as a speakers such as scs-140(100watts
subwofer+5 satellite per 50watts.

I firstly thought as a digital receiver DENON AVR-1603 but its quite
expensive.
afterwards They advised me sony str-de595 reciever.Is this reciever
suitable for my speaker system.Is it worth buying the DENON system
because approx.twice as much price than sony system.



The Denon is a much better receiver than the Sony. But it is probably overkill
for the speaker system you plan on getting. If you plan on getting better
speakers in the near future after using the scs-140 system for a while, the
Denon would be a good investment. If you plan on keeping the scs-140 speakers
for a few years, then the Sony receiver will be good enough...