RO/DI question

[C&C]

I am looking at purchasing a RO/DI unit.

I am planning on drinking this water as well, I have heard that if I am going to drink the water I should skip the DI....any truth to this. If so why?

What would be the consequences of not running DI for my reef??

Any suggestions as to where to get a good reliable unit from, I have heard a lot about ebay selling them cheaply, but I have also heard that you are getting what you pay for. Any comments?

Thanks

Chris