not at all really , unless u want a 3dcard + ppc, thats when incompability appears but its ofcourse fixable but in the long run u probably would do like i do now... 1 boot for ppc + warp3d and one for other stuff(ppc + minimized warp3d support etc)
anyway i can recomend a mediator, its the best buy i have ever done and i am a oldschooler , i love old games and old demos over new'r stuff.
but as a last thing, i'd recomend you to atleast get a 040 card , sue 030/50mhz is ok! but seriously once your mediator is up and running...u would like more speed... 060 is the best but its rather hard to find and its expensive.
go for the mediator and then eventually consider an cpu upgrade.
goodluck!