asdfqwer

Here is my list,in fact each host is different and there is no such a thing as "ideal host",those that are simply perfect has negative point as well,the price,however when i have contacted them i was inquirying for one server,since you are getting tens of servers they shoul dbe able to make you discount

Top hosts

http://www.isprime.com/ probably the only host that is connected at 60 Gbps
http://www.jupiterhosting.com/
http://www.cyberwurx.com/
http://www.natnet.com
http://www.rackspace.com
http://datapipe.com/
http://www.flyingcroc.net/hosting/
http://www.swiftwill.com/

Although they are all in the same list,they are all different,for example by response time to email tickets and DDoS policy
DDoS should be an issue with you,either you are hosting many small websites or one big you should has faced an attack in past

I know that ISPrime.com and Natnet.com has reached some decent success in fighting against DDoS

Other hosts that i would also consider are below,they are cheaper than above ones but are still very good


http://www.cavecreek.com/ owned by ccbill,the same company,same network
http://www.realitychecknetwork.com/
http://www.webair.com/ i have seen a very few negative posts about them and a lot of positive responses
http://www.techiemedia.net/ i heard nothing but good things about them

That one is unmanaged but has a good network and offering private racks,you could find a good management company and get servers there,the price (ev1servers+management) should be the same as going with a managed company
http://www.ev1servers.net/

90% your choice is depends on your budget

There is a known webhosting dedicated forum where you may want to research as well but you wont find anything new there,simply because top hosts list is small and known

Hopefully you will make a right decision,hosting is a critical factor for any website

Good luck