Any "must have" items for my H20-220 Edge kit?

[jalyst]

Older (deleted) post, pasted in this post for posterity:

Thanks Churchy, I realise this but the other single biggest factor is the conductivity of the water.
Do you know of any reliable sources of 2µS* or less distilled, or 0.5-5µS de-ionised water?
*microsiemens

That's a good point, even if I do source some very low µS DI water (say .5µS) for a reasonable price...
It won't take long before conductivity* reaches a point where it's the same µS as more easily obtainable & cheaper distilled or DI water!

So I may as well start with higher µS water from the outset, and just make sure I do a clean-up & water-change every 6mth!?
I hope I can get away with only once /yr though, too much of a PIA otherwise....

I've ordered 2x GT AP-15's for my Rad....
I'm also getting a top-notch HTPC (desktop) case, so hopefully it'll come with some decent case fans.

If there's not enough or they're ****, then I'll probably need to order some more.
Are these fans also among the best case fans, or are their better options for one's case?

So, "must-have" items I've ordered, or am close to ruling-in/out....

*and subsequently the potential for corrosion