Ultimately, the choice depends on your specific requirements, security considerations, and the trade-offs you are willing to make. If security is a top priority, and the existing VPN tunnel meets your needs, sticking with it might be the best option. I also have a lot to say, if you want to buy proxies, contact me personally. However, if the advantages of XO-proxy are compelling, and you can address the security concerns, it could be a reasonable choice.