I use the Sampo 620 and it can be easily modified via the loophole menu to be all-region and convert PAL to NTSC. There is one caveat, however. If your PAL DVD is anamorphic, the Sampo cannot convert it to NTSC and properly downconvert it for a 4:3 TV at the same time. If you have a widescreen set then it's no problem. Similarly, if you can do the vertical squeeze on your 4:3 set then it works fine. For around $139 it's a great, inexpensive solution. Check out the Sampo forum at http://www.nerd-out.com
for more info.