Caro.net has exceptional support and uptime. I have used them for 2 yrs in the past, there was only one outage and they gave the SLA credit promptly for the problem. Nothing but positive comments about them. I haven't used them recently but as long as i used them, they where very good.
Uberbandwdith i would rate high in value for money. They bundle free remote hands with their colo packages which is very useful exponentially if you aren't near the DC. You don't have to wait a long time for a ticket reply or you can use their phone support which is prompt. Network can be better but for the price paid its really good! If you aren't need of any management, then Uberbandwidth is a way to go. If you are targeting enterprise market over bandwidth volume based market, you should definitely go with caro.