Suggest PC configuration

suggest a pc configuration under 40k
i will be using it for some light gaming and running software related to design engineering such as Auto Cad Pro E Solid Works, Ansys etc and other regular stuff

Processor: AMD Athlon II X 4 635 (Rs.5000/-)
Mother Board: Gigabyte MA78GM-US2H (Rs.4000/-)
RAM: 2 x 1 GB DDR3 800MHz (Rs.2500)
Graphic Card: Galaxy GeForce GT240 (Rs.4500/-)
HDD: Seagate 500 GB 7200.11 (Rs. 1800/-)
Monitor: BenQ G2220HD (Rs.8500/-)
Cabinet: Cooler Master 690 (Rs.3800/-)
PSU: Corsair VX450 (Rs.3500)
Mouse: Logitech MX518 (Rs.1000)
Keyboard: Logitech Multimedia (Rs.500/-)
Optical Drive: LG H22N (Rs.1000/-)
Speaker: Altec Lansing VS2421 (Rs.2000/-)
UPS: APC 550W (Rs.2000/-)

Thanks, this is a great set up