DSP development board suggestions

[starn02]

Hi everybody,
I'm planning to make some development regarding a DSP based equalizer / crossover / room correction device.
Does anybody have some good soggestions about a DSP development board to create all that?
What I need is:

- quite good DSP power
- possibly floating point, I plan to implement FFT based equalization (realtine overlap - save block filtering)
- enough RAM for FFT intermediate results (maybe a 2048 or 4096 FFT)
- enough FLASH for the programs
- possibly on board SPDIF receivers and transmitters
- possibly on board 24 bit ADC and DAC ...
And to end up possibly the interface to LCD graphical modules or something similar ....

I'm I asking too much?
Does anybody have experience with commercial development boards or with generic DSP boards (low cost) that can be used for this purpose?
Thank you!