umitablets.com sells many brands of Chinese tablets and mobile phone, they are cheap and currently has a 5% discount.If you want to buy  one,you can click the website and see more products in it.

AIWA H677 Quad Core Tablet PC,Android 4.1.1 Operation System,1GB(DDR3) RAM,16GB Nand Flash ROM(Memory),Action ATM7029, 1.5GHz, Cortex A7 quad core CPU,8 Inch Capacitive Screen, IPS screen now is only cost $124.99.This tablet is fit for student,fast enough ,the screen is clear,and the price is aceptable.Product details:http://www.umitablets.com/aiwa-h677-quad-core-tablet-pc-8-inch-ips-screen-android-4-1-041494.html

I see this tablet in http://www.umitablets.com/ampe-a90-quad-core-a31s-tablet-pc-9-7-inch-ips-screen-android-4-1-1g-ram-8g-black.html

AMPE A90 Quad Core Tablet PC has Android 4.1.1 Operation System,Capacitive Screen,Up to 8 hours work time and it only cost me $155.99.But I don't know the selling point.

MTK6577 Android 4.1 Tablet PChttp://www.umitablets.com/m071-mtk6577-dual-core-android-4-1-tablet-pc-041290.html details:
CPU:MTK6577 dual-core 1.2GHZ
Operation System:Google Android 4.1.2
RAM:512MB (DDR 3)
ROM(Memory):4GB Nand Flash
Screen Size:7 Inch
Extend Card:Support TF card up to 32GB extended
Camera:Dual camera, front is 0.3 megapixels and back is 2.0 megapixels
Work Time:Up to 3-4 hours
Battery:2200 MAh
Product Size:9*108.*188.4mm
Product Weight:326g
Price:$102.00
I think there must have tablets better than this one

a tablet can never replace a laptop

You can find your answer in http://www.umitablets.com/catalog/seo_sitemap/category/.

Google Unveils Nexus 7 Android Tablet is perfect,but I like CHUWI V99 Quad Core Tablet PC http://www.umitablets.com/chuwi-v99-quad-core-9-7-inch-retina-screen-android-4-1-tablet-pc-041171.html for the price is lower.

Win 7 is faster than Android,but Android is more individuation and cost less.