I have no quarrels using non-
gw minis.
I got it a bit lucky with my current/previous army (chaos) as most of the figs
gw had for them were pretty nice in my opinion, so I didn't have to search through alternatives. Not so with my next army, vampire counts. I dislike pretty much everything in the current range except the nice new skeles/gg and few of the characters look allright. That means I'll have to look around for replacement figs, altough I think I'll get most of the models done by mixing other plastic kits from
gw to undead bits, such as getting the black knights done with bretonnian and grave guard bits. On the subject matter I'll most likely get some vampire reinforcements from Reaper and some Heresy ghouls.