Dell XCD 35is a bit sluggish compared to other phones. But with proper mods like CM7 can immensely improve the performance and also user experience.
These are the phones I suggest for 12 - 13k and still have an excellent user experience:
1) Spice Mi-410 (User thread:
http://www.techenclave.com/mobile-p...ne-1ghz-snapdragon-190441-58.html#post1893755)
Specs -
Spice Mi-410 - Full phone specifications
Price - 13,999
Advantages - Bigger 4.1 inch screen, Bigger ROM 1.5 gb, 1 Ghz Scorpion 2nd gen processor with Adrenos 205, Better multitasking, 5 MP camera with LED Flash, Front Camera, Android 2.3, WiFi b/g/n, PRICING.
Disadvantages - Spice Branding, Not 16M colors, Not scratch resistant glass
2) HTC Wildfire S
Specs -
HTC Wildfire S - Full phone specifications
Price - Rs 12890
Main Advantages - 5 MP Camera, LED Flash, Gorilla glass display, WiFi b/g/n, Good build, Bluetooth v3.0
Disadvantages - None for the phone in this price range.
3) Micromax A70
Specs -
Micromax A70 - Full phone specifications
Price - Rs 7328
Main Advantages - 5 MP camera, Price, Front Facing Camera, Android 2.2 Froyo
Disadvantages - No WiFi n, Not scratch resistant glass, No flash, Less ROM
4) Sony Xperia X10 Pro
Specs -
Sony Ericsson Xperia X10 mini pro - Full phone specifications
Price - Rs 11390
Main Advantages - 5 MP Camera, Scratch resistant glass, Qwerty Keyboard
Disadvantages - No WiFi n, Android 1.6 out of the box, Extremely low ROM at 128MB
5) LG Optimus One
Specs -
LG Optimus One P500 - Full phone specifications
Price - Rs 9390
Advantages - Price for LG, Decent specs for the price
Disadvantages - Only 3.2 MP Camera, No WiFi n
Other notables:
Spice Mi-310 -
Spice Mi-310 - Full phone specifications