I would recommend the Herpstat 2 at a minimum. Chances are you are going to end up with a second heat source or a second BP before too long. The Herpstat 2 is only $56 more than the Herpstat 1 ($195 vs $139).

I bought a Herpstat 1 for my first BP and shortly thereafter realized I needed to add a CHE (which ended up going on a Jumpstart). Recently, we purchased our second BP and I decided to expect the inevitable and purchased a Herpstat 6.