www.parallelimported.co.nz would be a place to start.
No chance on a DSLR, however you can get some reasonable point/shoot cameras at the $500 mark.
www.dpreview.com is the place to find out what's out there, and how good/bad it is
What does sand do?
Looks nice
Do you need it?
Probably not
Do you want it?
Up to you
or.. you can go and read about DSB's, and make your choice about them as well. If it's just a thin layer on the bottom however, it won't act as one anyway.
This thread is going places :lol:
My deltec was noisy, however the silencing bits that i got sent for it sorted that pretty much. I haven't tried a red sea, so can't speak for it however.
I have the 150 version, it's a nice tank.
For marine however I ditched the filter and lighthood - so it's not the greatest value. (I used it for freshwater first)