Higher blinds when heads-up definitely allow you to play a more aggressive game. My suggestion if you're not happy with the blind levels where you're already playing is to shop around - there's got to be a better structure for the game you want to play. Personally I like the Stars structure - T1500 to start and 10/20 blinds - it allows a good mix of strategies to work.
However, there's a great opportunity for adapting your style when playing with those slower structures. The opportunities for slowplaying, drawing your opponent in, and chipping his confidence away a hand at a time are much greater with the matches which begin with lower blinds.
FWIW, the heads-up section of Harrington on Hold'em Vol. II is very informative. If you don't yet have it, I highly recommend it.
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