manometer purchase advice

I have 2 Testo 510's that are a few years old. I posted about getting them calibrated, but that price from Testo was stupid!!!



I am looking at another 510(this is the only Testo item I have had success with), the SDMN6 or the AAB.



I have the iConnect, but $300 for a static(ONLY) probe is outside what I would pay.



I also would like a stand alone device, so the AAB is barely on the list, so I don't have to rely on another device.



Personal experience, pros and cons, welcome.



Thanks