VPS private servers. What are good providers?

Hello!
What are good providers for VPS you know? I have heard a lot of kvchosting.net and rockhoster.com.
What is your experience?
What are good providers for VPS you know? I have heard a lot of kvchosting.net and rockhoster.com.
What is your experience?
Comments
1. Good uptime
2. Good technical support
3. Fast resolution
4 . High stability
5. Providing secured server
6. Reasonable price
7. Anti spam /DDOS protection