That really sucks.. yeah aggressive sales could ruin the experience for sure.
In my opinion hydraulic brakes are the must. This is my personal experience and every time I had to grab on to my mechanical brakes, I hated it.
The mechanical brakes work like charm when they're brand new, and right after the maintenance (readjusting the cable, caliper adjustment, readjusting the levers, cleaning, etc) but that only lasts for couple of weeks.
So I had to upgrade it to hydraulic brakes, I just felt like I really had to.
Honestly, I don't think you can beat the bang for buck factor of Amego.
It's the cheapest, fastest, highest battery capacity, most powerful brakes, highest torque for climbing, etc.
The prices are in US dollars, I clicked their US pricing options:
Amego Infinite
(Link Removed - No Longer Exists)
$1748 + Free Shipping
Top Speed: 25mph (the actual assist goes up to 28mph)
Motor: 500W
Torque: 80Nm
Battery: 48V 13ah
Brakes: Tektro 180mm Hydraulic Disk Brake
Tires: Schwalbe 27.5 x 2.0
Gear: 8 speed
Fork: RST Neon Plus TNL
Blix Aveny
https://blixbike.com/products/aveny/?variant=12692263239735
$1899 + Free Shipping
Top Speed: 20mph
Motor: 350W
Torque: 60Nm
Battery: 36V 11ah
Brakes: Tektro 160mm Mechanical Disk Brake
Tires: Kenda 26 x 1.75
Gear: 7 speed
Fork: Rigid
Velec A2
http://www.velec.ca/us/bicycles/a2
$1799 + Unspecified Shipping (most likely free)
Top Speed: 20mph
Motor: 350W
Torque: unknown
Battery: 48V 10ah
Brakes: V-Brakes
Tires: Kenda 26 x 1.9
Gear: 7 speed
Fork: Rigid