My pleasure,
lol, ah I had assumed it was a typo, my apologies. 
We used to use the Seagate SV35's surveillance drives if that is what you're referencing....Id still recommend the purple even if you dont buy the drives from us, we found Seagates started pulling more power as they came nearer to end of life.
The 64ch is arguably our highest performing unit as even the 128ch uses the exact same processor. 😀
If you need any help placing your order feel free to call me direct at 1-866-573-8878-ext 123