32 bit arm based microcontroller selection

Dear sir,
please help me out in selecting arm based 32 bit microcontroller which supports buit-in following features.
- SPI/I2C
- USB 2.0
- Ethernet
- TFT Display controller
- should be low cost
- Approximate 256 KB internal RAM
- Approximate 1MB internal Flash
- also please give information about
development tool for that paricular
controller


Thanks in advance

with regards
sushma.k.s.