Unless you think 50 mph is reckless and unsafe, I'd avoid any route that takes you through Chi-town. It can take upwards of three hours traversing the windy city as you honk and slowly swerve around giant ditka-looking moustaches. I'd recomend jumping on I-74 in Cincinnati (beware the monacles, take the I-275 loop and you can skip the queen city, in fact Ohio, altogether). Circumvent Indy, and when 74 hits I39 (you're in IL now) you can shoot north and hit 43 just past the Wisconsin border. Unless you drive like a pansy, you should be able to maintain 70-80 mph on these roads. Also be sure to enjoy endless beauty of the midwestern landscape. One can truly never tire from the joys of corn and soybeans as far as the eye can see, or the mind fathom.
edit:
on the subject of tea...though loose-leaf is always preferable and can be readily acquired wherever your local literati lurk, ie coffeeshops, co-ops, Tofu-huts... the prebagged Stash brand is a decent enough alternative to your lipt0ns and carnations, and its available in a multitude of varieties. Also Yerba Mate, as previously mentioned, is quite the stuff and can be a hella good time. Also don't forget green tea, which, while lacking in the taste catagory (when brewed properly it should not be bitter), can be REbrewed once or twice and i find it to be rather invigorating. and I drink 4-5 espressos a day. so im not all that easily impressed.