Well we all know HostGator sucks.
the problem with the other site you listed is that they put "free" accounts on the same server as the paid acounts. that within itself is just a bad idea since most abusing clients are of the "free" type.
tumble
Not sure where you got that info from, but it is incorrect. We host our free clients on servers in a completely different DC as well as servers. I am not begging for any clients, but please clarify before you post. We have many clients who upgrade to paid accounts and we suggest they move, but many are happy where they are at.
Thanks