Thermoptic (and all),
I decided to purchase a transflective LCD from MotorCityTech.
I still have my Xenarc 840TSV which works perfectly - I thought the LCD had died, but as it turns out, only the 22pF cap on the invertor board blew. I have now replaced it and the entire unit works fine.
Regardless of this, I have always wanted a transflective display. I bought an 8.4" LCD from MotorCity Tech that has had the transflective upgrade performed to it already. It is an exact match to the original LCD in the xenarc

. It is also 800x600 native. (I had thought about 1024x768, but the line must be drawn somewhere. And in all honesty 800x600 looks amazing for CarPC/FE's - Desktop/Wordprocessing/Excel is the only thing I think that would benefit, and probably shouldnt be ocurring in the car

).
A Xenarc 840TSV is only $329 USD at the moment + $350 for the replacement transflective LCD would get you a very easy (and relatively not too expensive) xflec touchscreen solution.
I will report back with pics and a review once I install it in my car, but that wont be for a few weeks - until the fabrication is finished, as I dont want the new screen scratched!!
I'll try get some pics out-of-car in the sun in the meantime though.
Hope this provides another option for people to consider.
Thanks
Ice