I have played both races. Did the DB with the Khajiit, and the DB and TG with the Bosmer. I'd have to say it is a toss up: the Khajiit has the best bonus (to start) in sneak but the Bosmer has the best bonus in archery. They both have secondary skill bonuses in lock-picking and pickpocket. You'd do fine just choosing which ever one you like best.
Night Eye is awesome. Kajiit also make for better werewolves because of the unarmed bonus. Plus if you Major in heavy armor you can get a perk that allows you to do more damage while wearing gauntlets.... and get the Ebony Mail from Boethiah which makes you silent when sneaking and turns you into a wraith looking badass when you do. Then you can enchant rings, gauntlets, and amulets for better unarmored and just beat the **** out of everyone. My Kajiit character just mainly used archery and fists.... good memories. --- "I tied my own shoes once. It is an overrated experience."