If you are purely using this for browsing web and etc, I recommend that you do not buy a laptop.
I had the same dilemma, I wanted to browse the web whilst sitting on the toilet/bath etc. I bought a tablet insetad and never regretted it since.
With tablets you get:
Much much much more battery life.
Chargeable via USB/microUSB (for some models) so no need for bulky adapters.
Access to APPS
Much more mobile and easier to hold and much more compact
However if you ened some processing power (not much but some light processing power), then go with a budget i3/i5 laptop. Youll get all the power you want under 500euro. Heck theres some being sold brand enw for 400EUR, this should last you some 2 years before its fully depreciated. By then there would be much newer/more mobile tech anyway.
I had the same dilemma, I wanted to browse the web whilst sitting on the toilet/bath etc.
If I had a nickel.
That's actually not a bad suggestion though. If you really want the bigger screen and performance, the XPS will deliver with that i7 and SSD (you might need Windows OS for your programming as well; not sure how Android would treat you in regards to it).
Although Sandy Bridge is now two generations behind, it's still an i7 and still plenty capable.