Hi, 1450 is the current promo until March 2019, then price will slightly go up.

As for choosing between 3 systems, I recommend referring to our guide. In short, there is no "better", it really depends on your priorities, ease of maintenance vs. some extra contaminants removal. If still got questions, please let me know here or through PM.

https://frescatec.com/pou-how-to/

Thanks!