although i've not used mandrake 10, but i've used Mandrake 9.2. also i've used FC3test1. Between the two, I'd say the stability & maturity/robustness of Mandrake 9.2 has raised it's head couple of times. With FC3test1 i've had some initial teething troubles, but with most of them ironed out used some kind of workaround, I'd say I'm quite happy with the FC3test1. BTW, OO is bundled with FC3t1, so you'd not miss it. Note that latest fedora is FC3t3, so it's approaching stability & maturity faster, note that FC2 got stabilized in about 3 test cycles.
my $0.02,
bd