My FPGA design looking for new home.. Altera FPGA?

Hi guys. I have a couple different questions regarding Altera FPGA and environment.

So I am looking for the easiest path to moving a design presently running on Spartan3AN, into another FPGA of equal or greater capabilities.

1) The FPGA design is very simple, and could be implemented on just about any FPGA with enough power, so my choice is going to be largely on the level of technical support available - what's available from Altera in terms of regular subscription, or Altera dev. board level support, or by paid coaching?

The design running on Spartan3AN (@20MHz constraint) is at 70% resources use, and executes within 70% of the available time - the design is an audio DSP with 48KHz. stereo 24bit codec IN/OUT - A main soft processor loop waits for the AD conversion (each 20.8uS), then executes the DSP calculations of input, loads the DA register with output, waits for next AD conversion.

2) The DSP function is also pretty straight forward, but the design accepts an external 49.152 clock that the design uses to run the codec at 48KHz. Is there a dev. board with such codec onboard? How about FPGA audio project designs with external clocking? How about for the Max10 series?

The design works perfectly on the 3AN, but I am having some minor issues with flash due to wafer change, ISE patches, and welcome the chance to move to a more contemporary FPGA if there is an easy* path, in particular with respect to the codec (Delta-sigmoid) and driving it at 48Khz. from 49.152 (or other frequency in this range). Eagerly awaiting any and all opinions and comments, advice. Thanks.