I bought "Asus P535" instead of "HTC Touch Viva" for Rs.12200/- from Wavetel velachery, chennai-42. There is a cheaper model @ Rs.10,000/- that matches HTCtouch but I took this which is still cheaper than HTC but performs better.The processor is so fast it can handle any job thrown at it. By the way, my favourite place to get windows mobile software is ppcsoftz.blogspot.com
I am very happy to own this phone except when somebody asks me if this is imported korean phone. FYI-It is not. If you cant live without radio, U can see something else-perhaps a higher end model from Asus should do. For internet, I use wi-fi and link it to my bsnl broadband modem/router at home so virtually no cost.
For inbuilt GPS, I use Google maps. Works great, depends on coverage.
GUI is plain and washed out. So installed SPB-shell GUI. Looks beautiful. very responsive.