Help choosing BMS
 

Hi all, need some help in choosing a BMS for my home made 13s8p 20ah 18650 pack.

Just wondering if anyone had experience with either of these boards (as they seem to be everywhere) or else which one will be the better choice for ~40A max discharge:
48V 54 6V 13S 45A Lithium ion Li ion Li Po LiPo Polymer Battery bms PCB System | eBay
40A Lithium-Ion**7S 10S 13S**Bleeding**BMS(20A-40A) - (seems cheap)
Battery Management Circuit(BMS) for 13S 44.4V Li-ion/Li-Polymer Battery Packs (looks awesome)

Cheers everyone :)

I got a reply from BesTech - $37USD for 2 (min order) with my own preferences - I would figure closer to $50 with shipping and conversion added on.