No visible ghosting on the epson that I noticed.
Tw8100 is the same as 5020ub except for a couple of image presets (thq & thq 3d mode) present in the 5020, input current (220v vs 110v in 5020) and the fact that 5020 is only for US. Europe and everywhere else tw8100 is sold instead. Hardware is all same as 5020.
Tried the super resolution but it didn't really make the image sharp or anything. I'm not really sure how a 1080p projector/display can improve an image from a 1080p source (bluray). Maybe if you try it with DVDs, it can (atleast technically) improve the PQ. Didnt see much improvement in 1080i tatasky hd channels either. For regular SD TV channels from tatasky which are already ridiculousouly compressed and have visible artifacts even before you try to sharpen it, using the super res only made it worse. Epson has a 0-5 scale for super res. Until 3 there was very little artifacting and the pic did look slightly better (though nothing groundbreaking) but once you turn t to 5 (max), it just gets too messed up to bother with it. Try to get a demo of the panasonic. I still have my doubts if something can really upscale a 1080p source image to somehow look sharper on a 1080p display but if the reviewers say its a real improvement, then maybe it might be worth it. Atleast with epson, its not worth bothering with it.
Using a 133" screen, the pixels are very noticeable at ~4 feet. Until 8 feet, I can still (barely) notice the pixels IF I look hard enough at a non moving section of the image. Otherwise when watching a movie or something else, there's is no way I can notice the pixels. From 15' (the minimum distance I plan to watch the movies from in my new room) or 17' (my current watching distance), everything looks as sharp as you can expect the source to be at that size. ie, 1080p is really really sharp. 720p HdTv is slightly softer in comparison but still very very sharp. Tatasky SD channels are just plain crap when blown upto 110"(as they are 4:3, you get 110" of SD image on a 133" widescreen). Waste of your lamp hours IMHO. DVDs are watchable though nowhere as pleasant as 720/1080p.
After that I zoomed in a bit so that the image is appx 150" diagonal now. Pixels are a bit more visible now. Easily visible upto 5'. Barely noticeable at 10'. Still a little bit noticeable at 12' (you'll have to squint your eyes and focus on a non moving, bright section of the image, or pause the video). It's something I could live with but for that distance, the 150" image is just a bit too big for me. Even my 133" seems too big for 12". 120" would be the perfect size if you are watching it from ~12' IMHO. But since you already are accustomed to watch a 150" screen, I guess it won't be problem for you. The only real way to confirm you won't notice the pixels at all is if you demo the PJ yourself. Though I understand that it probably won't be possible.
About the panasonic being better than epson in this regard, I'm not really sure it'd be a huge improvement. To the best of my knowledge (correct me if it turns out to be incorrect), panasonic sources it's LCD panel for pj from epson itself so not sure how it could be better here. Maybe panasonic is getting a better panel than what epson is putting in its own PJ but that doesn't make sense to me either as why would epson not use the same panel for their own flagship model. Still, anything is possible. If you still feel like panasonic will have better image quality then go for it. At the very least you'll get motorised zoom and focus if nothing else. For me the epson's lower price and still better (or in the worst case, similar) performance along with slightly cheaper bulbs and (reportedly) better after sales service made sure I don't bother with the panasonic
