Regarding importing a pearl, you can save a few quid, but is it really worth it if anything goes wrong ? It may be OK if you have your father who can bring it back to the States, but bearing in mind it's a relatively heavy PJ (for non CRT) and you don't want to keep moving it around the place. The main issue with them is misconvergence. I have my red which is 1 pixel too low. I'm still deciding whether to live with it or try and get it sorted / replaced. Of course, if you have it at a local-ish dealer (I notice you said you live in the sticks!) a two-hour round trip to get it fixed is certainly worth some money in terms of peace of mind IMHO.
As for your original question, I went from a VPL-HS50 (3LCD Sony PJ) to the Pearl. I don't have any HD material yet, although I have downloaded a few WM9HD clips off the net. I run mine via HDMI through a PC so the PC is effectively scaling the picture.
The result is a big step up from the HS50. The total lack of screendoor effect and very good blacks means it was worth it for me. And even with SD material, if you have a good scaler, it looks very good. Of course, it's not as sharp as an HD picture, but very smooth and film-like. If I walk up to the screen, I don't notice any horrible aliasing or pixel structure. It's certainly not "digital looking". When I finally get HD (BD or HD DVD), it will only get better.
Think of it this way, even when watching SD, it's like being at your local cinema with a slightly soft focus. If you like that kind of picture, you're sure to like the pearl