PSX1 to XBOX360 adapter

[Stormrider]

I need to make a decision: Xconverter or Controller Converter Pro. I don't mind about the price or the fact that you have to plug a xbox controller to it. None of them have lag and reviews are quite favorable to both. However, I've found some comments about the Controller Converter Pro having issues with PSX digital only pads (they say you can have problems if the game uses analogue input apart from digital input). I have several arcade sticks and all of them use old third party digital only pads (Venom) and I wonder if this could be a problem. I wish to use it with digital functions only in xbox games which supposedly, use digital controls (shmups, fighting games, etc). Anyone here has this kind of setup: control panel with third party digital pad hack and any of these adapters?

[SNAAKE]

xconverter is the best and non-laggy converter. it should work with any pad. sony digital and dualshock worked fine. I dont have any 3rd party anything to test it with.
http://www.etokki.com/Joytron%20Xconverter%20360%20Plus