I dont know what to say here
Knownsrv - They are a great host and the support knows how to deal in situations
Xsltel - Helped me countless number of times!
Both of them are great at quality, support
But if you are using DLE, as i heard above i guess, then you do need to optimize the script a lot
DLE is really a very badly coded script and it f*** the server badly. Disable plugins which are not needed, i am sure it will help
I'd just like to point out KnownSRV servers were NOT down - YOUR site was unavailable due to YOUR resource overusage. I'm glad you finally found a host that does NOT limit your resource usage. If he allows you to push all the resources on shared hosting, who am I to spoil your happiness.
Good luck.