I used to be against buying pet insurance, but I found a newer company that seems really promising...
Healthy Paws Pet Insurance. They cover breed specific conditions & hip displaysia which is very rare for any pet insurance company. They also do NOT have a "ceiling" on what they will pay out. They have the highest rating of any company and their customer service has already been great even though I have not had to file a claim (though it seems from reviews that most claims are paid in about 3-4 business days). It does take 15 days for coverage to begin once you sign up, which is a bit of a gamble, but I didn't mind it too much...that was really the only downside at all. I pay about $35 a month for a $50 deductible and 90% coverage. I figure I am putting out a bit of money, but if anything ever happens, it will be worth it...vet bills can get extremely expensive. I am also saving money in an account, but it will be reassuring that if I ever use those savings for a vet emergency, I will be reimbursed!
ETA: They also apply some of the premium you pay to homeless animals which I think is GREAT!