Mazda2. Less expensive to buy than a Fit, more reliable in my opinion (though both are realistically great... I've never had to replace an engine in a 2 for burning oil), lighter (even easier on consumables), and frankly I think they feel more fun/nimble.
I've got 166k on mine, and will be tracking it at least 3-4 more weekends this year, next one being a month from now. Literally the only things I've had to do are reseal the oil pan (1hr and tube of RTV, could not be any easier), replace the spark plugs a bit before the stated 75k interval, and replaced one inner tie rod end. I'm still on the original clutch, and rear brake shoes/drums. There isn't a lot of weight back there so they don't wear much at all, though I will be replacing them soon with some Porterfield R4-S shoes and new drums to try and move a bit of the brake bias rearwards since I've been running Hoosiers. They definitely are nowhere near needing replacement though.
If you get one just do the following:
-Good front pads and new rotors (I just run cheap Centric $14/ea rotors). For pads, Hawk HPS 5.0 will work fine for your first few track days, and make a great daily pad. I run G-Loc R10s now (about $170), but they last 7-8 days on track for me. I could get 2-3 days from the HPS 5.0 (which now run about $80, used to be more like $50)... but since I am a lot more aggressive with the brakes and on sticker tires now, I can glaze them over if I really want to. Note: depending on track it may sway you from streetable track pads to true track pads if you're somewhere hard on brakes.
-Rear sway bar - lose some body roll, help it turn in, better power down out of corners. DDMWorks - $90.
-Bleed brakes - I run Motul 600 now.
-Adjust the rear brake shoes. You should be able to make the e-brake hold the car with one click when this is done properly. Makes a HUGE difference in pedal feel because it gets rid of a lot of dead pedal before the shoes make contact.
-$20 set of camber bolts + alignment. Will help grip and tire wear. win-win. MAX out the front camber.
-Track it and have fun. If you start doing it regularly, lower it and consider coilovers to up the spring rates which will help with tire wear. You'll still wear the outsides faster up front, but even still because the rear brakes literally never wear out, you are still saving a lot of money. Hankook RS4s are amazing for longevity. Flip them on the rims halfway through their life. I've gotten 7 days on track from them with a bit of life still left. Will be used up on my girlfriend's car most likely. The 195/50R15 RS4s are actually 0.6in wider than the 205 RE71Rs and 0.25in shorter which helps gearing. On a 7-7.5in wide wheel is ideal.
This is the only car I've ever owned long enough to actually pay off and keep it. It's so ridiculously fun and simple. Everything is easy to access/maintain/etc. In fact we picked up a second one to daily and for my girlfriend to start tracking... Hers has 115k on it.