Reddit reviews Suntour SP12-NCX Mountain Road Bike Suspension Travel Seatpost 27.2 x 400mm

What are you looking for?

I definitely recommend a suspension seat post for more comfort.
https://www.amazon.com/dp/B01BIQN9UC/ref=cm_sw_r_cp_api_i_0dKcBb0HND9Z2

I also put a ram mount on mine so I can have my phone on the bars for gps. Makes it easy to connect to the USB port too.

I added a second usb rechargeable led headlight along with a rechargeable tail.
https://www.amazon.com/dp/B077CZK75L/ref=cm_sw_r_cp_api_i_9eKcBbC7DX9KQ

And lastly, I put on some cheap plastic moto hand guards to protect my hands since I trail ride it often.
https://www.amazon.com/dp/B073P3JH7F/ref=cm_sw_r_cp_api_i_bcKcBbM524YT5

This also fits nice in the nook behind the battery
https://www.amazon.com/dp/B00ZP3ADU4/ref=cm_sw_r_cp_api_i_jdKcBbED6PRMF

Rather than saddles, think of the seat post. They get great reviews.

Im tossing up between these ones, and cant decide which is better for eBikes:

Thudbuster

https://www.amazon.com/gp/product/B01BIQN9UC/ref=ox_sc_sfl_title_1?ie=UTF8&psc=1&smid=A1C9T7ACO5T769

and

Suntour

https://www.amazon.com/gp/product/B000T3BYH6/ref=ox_sc_sfl_title_3?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

If you're already using it to commute that short of a distance I'd recommend a small 250W-500W hub, like the Golden Motor Smart Pie and a small (<10Ah) 52V battery. The Smart Pie only weighs ~12lbs, and the controller is built into the hub which simplifies installation. It'll basically make the trip faster and hills easier without drastically altering the character of the bike, or raising your speeds to the point of being dangerous without suspension and disc brakes. I would also consider at least 1.5" wide tires to reduce the chance of breaking spokes and a suspension seat post to mitigate the impact of bumps at higher speeds.

I share your pain with regard to the angry drivers. It doesn't matter how fast you're going, in my experience, most drivers equate 'bicycle' with 'slow', and slow = road rage.

For the rough bike lanes though, have you considered switching to a suspension seatpost? Preferably something nice like a Thudbuster or NCX, but I rode with a cheapo telescoping seatpost for over a year, and even that is a massive comfort improvement over a normal rigid seatpost.

I would also consider lowering the tire pressure a bit, but not too much, since you don't want to risk getting pinch flats.