Opinion on Altium's nVisage VHDL tools?

Hi,

I am looking for a reasonably priced front-end toolset for VHDL
multi-vendor FPGA design.  This should as a minimum provide:
* VHDL design entry (text based and high level graphical)
* Functional simulation (testbenches with file I/O) 
* Post-synthesis and timing (post-PAR) simulation.

For this I am considering ActiveHDL, but since we also do a lot of
hardware design using the Protel schematic and PCB tools, the new
nVisage DXP version with integrated VHDL front-end tools looks
interesting.  As anybody used these tools in nVisage or DXP and has
any opinion on their maturity, features and quality?

Thanks!
Niki