Anything by original skateboards.
vult
bamboo is the best for a good flexable board, but if you cant get that maple wood is the second best
I got a sweet element cork longboard cruise off of craigslist for $50
there is no best longboard for anything there just different but a good crusing board must be quiet smooth and easy to push.
purple orangutans are good
Ibn kelb
Look in the silverfish classifieds for a good fast longboard that is affordable and fits your requirements.
There seems to be good reviews for the Santa Cruz Stormtrooper longboard. Many who have purchased this and tried it out have said they really like it and it is better than other boards they have had.
Surfing- on the longboard- was created in Hawaii. It is the best.
there not the best, but they are pretty reliable
longboard races
The average price of a loaded longboard is around $300. You can find a good selection at - http://www.loadedboards.com/store/agora.cgi?xm=on&product=COMPLETES