the biggest con for you is going to be insurance cost.
Yes and no.
Sure I am getting raped being at $240/month cdn. for my 94 MX-6 LS V6 Mystere 140km, however my insurance was actually more expensive on my 1991 Escort GT that had 220km on it. (then again a stock scort GT runs higher 15's stock, so it was slightly quicker than the stock V6)
IMO Pros and Cons
Pro:
The v6 and 4 banger both have great potential.
Torque is good.
Owning a luxury sports car is always a plus.
Interior design is great.
Exterior styling is great.
Suspension is great for stock.
Tranny holds good Ive heard.
Cons:
You may find the I4 underpowered stock.(has great potential though)
Ive heard from many, many people that the KL03 wont last much past 200,000kms. Sure the KLZE is a sweet swap, but it sucks that the hassle must take place(i dont know why they just didnt use the ZE in North America)
Apparently alot of things like to break in MX-6's. Thank god I havent experience anything yet!