Ok, testing done. Of course I am just one guy with a belly full of Shiraz so don't assume anything is set in stone.
PC output though the 3D-XL (just tested with nVidia's test demo) - apparently this breaks the nVidia emitter. Not sure why. I plugged it into the Optoma's vesa port but that didn't help. DLP Link worked just fine. Now the weird thing is I plugged my new 3Dheaven Samsung emitter into the Vesa Port on the 3D-XL and that actually worked. Apparently it knows it is getting a 3D signal. I didn't test 3DTV Play. I hope to try that later.
So I posted this in the other thread:
"I got my samsung emitter hooked up to my 3D-XL. It is amazing. The rechargable IR glasses are very nice. They have replaceable nose peices. Luckily the thinest one most closely fit the original Ultraclears, which I like the shape of. The rubber nose peice combined with the lighter weight of the glasses is really nice. Plus no eye reversal, and no stupid 3D menu popup on the Acer, are extra bonus. Very happy so far. The emitter is really small. I was worried about power, but I they kept sync even when I went to the bathroom next to my theater. I wasn't even in view of the emitter. Not sure how it could bounce off my flat black room. Way better than the nVidia emitter, which is huge."
I forgot to mention another advantage. They block the IR flash from the DLP link glasses unlike the nVidia glasses. I have no problem using these in conjunction with the DLP Link glasses (although I would still like to replace them all for the comfort factor and lack of eye reversal)
So, if you want to do 3D, I STRONGLY recommend the 3D-XL, or any other adapter with VESA emitter port, with the 3DHeaven Samsung emitter and samsung compatible UC rechargable glasses.