I'm new to the CarPC game, but I've been visiting this site for about a year now trying to decide what type of equipment to buy. As far as LCD's go, I've read a lot of posts where people seriously regretted buying Lilliputs. The Lilliput screens can be removed and custom molded into a dash. However, I've read a lot about people ruining their lilliputs by taking them out of the enclosure. I've also read that while many people have had luck with these screens, the touchscreen often goes haywire as well.
While Xenarc's are also succeptable to breaking once they are taken out of the case, I've read enough cases to convince me that the Xenarc is the way to go, even at $100+ more per screen. Like I said, I don't own either, but I have a piggy bank just about full waiting to purchase the Xenarc 700TSV.