Don't disagree with anything anyone's said here, but I'd suggest it much depends on what you're looking to get from it:
The 152 is a somewhat limited aerobat, and as has been suggested, the time spent gaining/regaining altitude will eat up some of the cost differential, generally aeros hops will be fairly short, in the order of .6 or so anyway. However, it will spin more like 'regular' aircraft, and is (I'm guessing) more like the aircraft you're used to.
Both the pitts and the 200 will be like nothing normal - it'll take a while to get your head around how responsive they are.
I have flown with Luke in the '200; would second the comment he's a great instructor. Also a lovely aeroplane. In some ways it's like learning on a car with all the driver aids tho, it's a bit german in character - clinically efficient
It is however tremendously capable and will go exactly where you put it. That can be a blessing and a curse!
On the flipside, the pitts isn't impossible - I'm inclined to think they're over-maligned, but it is long on 'character', interesting near the ground, just a bit more mad, and a little more likely to bite. I couldn't comment on the instruction, never been near those you mention.
If you're in for aeros as a long term interest, I'd consider the pitts. It'll take most people longer to get solo in the pitts, but it's good tailwheel time, and there are a lot around - it's probably transferrable if you want to move around. A hireable extra is a bit of an oddity (a lovely one at that).
If you just want a little experience, the 152 might not be a bad idea; also look for a decathlon (great IMHO), or a Robin 2160 - I seem to recall hearing of one up that way a while back - the latter being a nosewheel makes life easier if you've not done the taildragging thing yet.
Lastly, i'd probably stay away from upside down spinning to start with - good thing to know, but quite confronting.