What is your requirements? How will you use your phone?
Of the list, I would suggest:
Motorola Defy
Positives -Bigger screen 3.7 inch screen, Faster processor, Water/Dust proof, Rugged design, Excellent CM7 support
Negatives - GPU is not that great for playing games, risk of red or green lens.
User Thread -
http://www.techenclave.com/mobile-phones/the-motorola-defy-thread-191764.html
Price -
Buy Motorola Defy MB525 at Best Price in India - Also find Specifications, Photos, Features & Reviews
Specs -
Motorola DEFY - Full phone specifications
Why not to go for Defy+ ?
* Same camera
* Same design
* Same processor. Only difference is processor is now clocked at 1 ghz. This is already achievable in current Defy
* Since it is getting released now and Defy costing 15k, the Defy+ should be priced around 17k atleast. So it defeats the purpose of getting that by paying extra when you can get a similar one for cheaper.
Now if you are not so keen on bigger screen, I would suggest
Sony Xperia Mini Pro SK17i
Positives - Much powerful 2nd generation 1 ghz processor, Excellent GPU for gaming, Qwerty keypad, Excellent Bravia screen display, Excellent Camera, Will recieve the Android 4.0 as announced by Sony
Negatives - Small 3.2 inch screen, less internal ROM but that is taken care of by external SD
Price -
Buy Sony Ericsson Xperia Mini Pro SK17i (White) at Best Price in India - Also find Specifications, Photos, Features & Reviews
Specs -
Sony Ericsson Xperia mini pro - Full phone specifications
Sony has promised that all 2011 Xperia models will recieve the Android 4.0 so you are also covered on that.
Also Why not this?
Spice Mi-410
Positives - Big 4.1 inch screen, Excellent 2nd generation 1 ghz scorpion processor, Adrenos 205 gpu for excellent gaming, 1 GB ROM, Decent screen resolution (not breathtaking), Gingerbread available, Dual camera
Negatives - Spice brand, occasional problems
User Thread -
http://www.techenclave.com/mobile-phones/spice-mi-410-smartphone-1ghz-snapdragon-190441.html
Price -
Spice Mi-410 | Spice Mobile Phones | Saholic.com
Specs -
Spice Mi-410 - Full phone specifications