XFree 4.3 supports the chip, no problem there. The console drivers seems to work just fine with 9000, but fails miserably with 9700 (9000 DOES have R300, it's the 9200 that doesn't. For some odd reason they decided to release the next 8xxx card as 9200 or something). Considering everyone involved in the amigaone-linux project on sourceforge has pressing business elsewhere at the moment (half the people are doing OS4 drivers, and some are just too plain busy), for NOW it's better to go safe. But I can't remember having told people not to get an R300. As long as XFree 4.3 supports it, there's no reason not to use it. And I think OS4 will support it via that external library someone was doing. But I'm not entirely certain.