I was all set to buy an AT-X as I thought the comp trigger issues were all from people adjusting them too low but the latest few posts on the issue suggest that's not the case. I want to buy an AI "partly" due to it being reliable, the comp trigger sounds like it's a liability.Unless you don't want a questionable trigger.
In the UK it's cheaper to buy an AT-X rather than an AT/AX and add the AO forend but if you have to buy a factory trigger as a spare then the AT+AO looks like the better deal.