Synplify Pro for resource optimization?

My experience, with Altera, the tools usually do a pretty good job up to about 92-95% on the LE's.

I know Synplify use to do much better than Xilinx tools and was pretty much considered a requirement to a Xilinx flow. But since I been using Altera, I haven't seen a area where I would consider the cost worth it.

Quartus does a good job, and the Design Space Explorer usually gets you that few percentage more if you need it.

I would validate the size of the blocks make sense post synthesis. I've found cases in the past, where particular blocks were much larger than expected due to the way the source was written, and could be optimized by changing the RTL slightly.

Pete