Hello,
Thanks for your interest in KnownHost. Also, sorry for the delay in responding. Based on your needs and web stats currently I wouldn't recommend our VPS M plan. The VPS M is for simple sites that people want to have more freedom with as you get your own mail server, IP's, root access, etc. I would recommend trying our VPS L to start then go from there. The last thing you want is to have the site going down due to you running out of resources. Again, I wouldn't recommend the VPS M but if you want to try it then upgrade feel free. So many things factor in to a website like how it is written, scripts, etc so it is next to impossible to say yes or no.
Thanks,
Joel