You should go with Lenovo ideapad z series laptop, Actually I'm using Lenovo ideapad z570 laptop from last 3 years. Its working very fine. This laptop is very cheap and much faster in compare of others. You can see the specification of this laptop.
SPECIFICATIONS:
- Up to 2nd generation Intel® Core™ i5 processor with Intel® Turbo Boost Technology 2.0
- Up to Genuine Windows® 7 Home Premium
- Lenovo Enhanced Experience 2.0 for Windows® 7 with RapidBoot technology - delivers faster start-up & shutdown and optimized multimedia capabilities
- 15.6" Backlit LED HD display (1366x768), 16:9 widescreen
- Up to NVIDIA® GeForce® GT540M 2GB graphics with DirectX® 11
- Up to 8GB DDR3 memory, up to 750GB HDD storage
- Integrated Bluetooth®1, WiMax2 & high-speed 802.11n Wi-Fi
- Integrated DVD reader/writer & Blu-ray Disc™1 drive
- USB2.0, eSATA connectors & 5in1 card-reader
- Integrated 0.3/2M (720p HD1) webcam