Let’s Encrypt SSL certificate is not recommended for business level websites, as it is limited for domain validation only.
It’s depends on you. If you have a small website just go with domain validated SSL Certificate which start under $5.
If you have an eCommerce based website, then go with Organization Validation (available under $30) or EV SSL Certificate (available at $99).
I would recommend CheapSSLSecurity (https://cheapsslsecurity.com/) where you can get your choice SSL Certificate at lowest price with instant technical support.