Claritin is the best since it works fast in reducing the symptoms of seasonal allergies, like sneezing, watery eyes and runny nose, itching of the nose and throat. Though Allegra is good as well, I'd choose Claritin.
My Mom swears by Allegra while I stand by Claritan. As far as prices go I buy "Walitan" which is Walgreen's generic Claritan. I can get 100 for the price of 24 Claritan. If you look at the big displays announcing Allegra's non-presription arrival, you will find a $2 coupon on back of the pamphlet there. I hope whatever you get works for you. If you are on prescription medications ask the Pharmacist which may be right for you.