Thanks for the responses.
Price point for entry in to mining is a factor for me. So, the FPGA proposition is a bitter pill considering, when not buying FPGA rig gear in bulk qty, the MH/$ is not attractive.
The commercial package from BFL is nice, but considering it's MH/W the electrical expense could equate to 20% overhead when BTC reward halves. Not including any other potential negative market conditions in the future, particularly difficulty.
Still thinking it over. I've considered an incremental entry to mining, but with what I have yet to decide.