I agree with TxVegas, Sunset Thomas was one of the best lap dances I ever had back before her fame went to her head. I got dances from her three times. The first time I saw her, her lap dance cost the same as any other dancer in the club, the second time only $10 more, which was the cheapest of any Pornstar at the time, and both times she went farther than most of the dancers went in the clubs.
By the time she was charged $60 / song, when most dancers charged only $40 or $50 a song. I lucked out and won a dance from her by shooting a dollar in a really tiny shot glass. I am glad it was free, since it was a complete waste of time.
As for the best pornstar to give me a lap dance, I would say it was Asia Carrera, who I got dances from twice and both times were at the same price as the club dancers. The first time was $30 / song, and the second time was 2 for $50. Unfortunately she retired from Adult Movies and features.
The best feature dancer hands down, wasn't a pornstar but a magazine model named Tabatha Jordon, who also went by Haley Hills. I believe she started as a house dancers, and it shows. I saw her three times, at three different clubs and each time she did two songs for $50 and gave a better dance than most of the dancers at any club I have visited.