What I would want in my phone
1) a decent 3-5mp cam with 720p video recording.
Not available in current dual-sims.
2) Android 4.0
Not available in current dual-sims.
3) Screen resolution of atleast 800x480
Not available in current dual-sims.
4)Battery life of atleast 1 day with heavy usage.
Not available in current dual-sims.
5)RAM >= 512MB
Available in only a few dual-sims. In most cases it's not mentioned.
6)Fast processor+ decent gpu
Not available in current dual-sims.
If you're willing to compromise on all the above points then you can buy any of the current Micromax's, Spices, Karbonns etc.
The Viewphone 3 looks really nice, and feels solid. You can buy that as well. I haven't seen any of the Micromax or Spice Androids, so I can't compare the build quality.
The LG P968 is another option. It's got a smaller screen than the others, but should give you better battery life and better warranty support than Micormax/Spice.