haven't shot any of those but I have an etek coming through next week, I would have thought the pmr would be a perfectly good backup so maybe just sell the eos ?? and use the cash for paint
As tom said, having two markers from the same manufacturer makes sense.
Many spares such as eyes, o rings, seals etc will be the same and maintenaince regimes should be similar.
i havnt used a pmr before but my team mates have got eteks which are damn good. listen to the guys on here and sell the eos. Also the fact that an Etek costs quite a bit more, says something but its your choice.