RO system help

I am looking to purchase my first RO system. I did some research and think I am going to go with SpectraPure. I am debating between the Maxpure and CSP models. Is anyone familiar with these?

 

They are basically the same system except the CSP-DI comes with a dual inline TDS meter. I prefer handheld TDS meters due to their better accuracy and portability meaning you can test anywhere including tap water, RO only, RO/DI, your ATO reservoir, bottled water etc. The dual inline is dedicated to just two places and cannot be used portable and is not truly temperature compensated so has limitations.

The MaxPure is on sale for a limited time for $120 and a handheld meter is $25.
MAXPURE MPDI SYSTEM

The CSP-DI is $199.

 

Thanks for the info AZ. Is DI really that important to have? If not then I guess I'll go with the Maxpure and the handheld meter.

 

The $120 system does have the SilicaBuster DI:
MAXPURE MPDI SYSTEM