Are you looking for a lotion to use with a tanning bed or a self tanner? For self tanners my favorites are Bare Escentual Faux Tan and Tan Towels. I've also heard good things about Estee Lauder Bronze Goddess gel which I'm planning to give a try. I am a self tanner queen so if you have any questions about them I'm your girl.
ETA- just re-read your post and see you're looking for tanning bed lotions. I still recommend self tanner.
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226