Is it BAD to place CDP/DVP on top of RCVR?

In order to make room for outboard amp to power front 2-3 channels of HT system, I would need to move DVD/CD player on top of a Pioneer vsx49tx HT rcvr. Is that BAD? The pioneer doesn't run too hot, and probably much less so with outboard amp for front 2 or 3 chnls, but will heat from rcvr affect dvd/cd player?. Any other issues (interference, platform stability, etc) from this setup that will affect playback? Thanks much...Jeff