I've heard bad things about Site5...my friend was on it and he was getting DoSed like crazy and their DoS protection is horrible, or at the time it was. They made him take his site down...
As for me, I bought a dedicated server through
Jewlzk | Web Hosting - Home . He's a good friend with my server tech I lug around with me lol so we got a killer rate and when we've ran into problems (very VERY few compared to other hosting companies), the guy running jewlzk helped out immediately and fixed the problem pronto
For dedicated servers, I would suggest jewlzk or
Softlayer Technologies, Inc.. Softlayer has great DDoS protection (only for 1 dollar more a month - lol I have big problems with DDoSers so it was a good deal) and their customer support is absolutely amazing.
Other hosting that I've used would be hostgator (great support, uptime and ddos protection) and bluehost (meh...cheap...you get what you pay for).
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