After reading what you said I was thinking of buying it. However, I searched through the FIFA08 official website and there are a lot of complains - Everyone's complaining about the AI (so it's not only you), most people feel like they were ripped off because they do not see the AI working..
Another popular complain, is the computer's stamina - a lot of people have stated that your players get tyred easily, while the computer player manage to keep sprinting up and down the pitch with 0 stamina left.
And as for the player ratings - FIFA08 rating are pretty f-u-c-k-e-d up.. I mean, Ronaldo with 84 is reasonable because Ronaldo is not that good at´passing, crossing, free-kicks, and other things, yes he's great at dribbling and at shooting and I'm pretty sure he haves very good Dribbling and shooting skills. Kaká's 90 is actually a very good and accurate rating in my opinion. On the other hand, Rooney with a 90?? Ronaldinho with an 91?? Ronaldinho's 91 rating actually annoyed me, becasue Ronaldinho is not close to 91, at least not in his recent form - His pace has gone down drammaticaly, I would rate Dinho with an 87. Gilardino's 85 is ridiculous!! FIFA hugely overrates his cover boys (Ronaldinho, Rooney), I'm sure that had Kaká been on the cover he would have like a 94..
And as for Riquelme, he should have the same 88 as in 07.. I mean, Riquelme is not even in his peak yet.
I still think I'm going to buy it, because Pro Evolution Soccer 2008 won't be out (it is already out in England, but wont reach the US for the nest 4 months) for the next 4 months.. However I suggest you buy Pro Evo Soccer 2008 when you have the chance drucurl - the best soccer game out there, great reviews, and Konami accomplished exactly what I wanted from them - PES's great 'game play' with FIFA's great 'graphics'. FIFA is going to get runned over by Pro Evolution Soccer 2008, gameplay and graphics - no one can beat that, a clear winner over FIFA (by the way, the PES08 with great graphics is the version for PS3 or XBOX360). Nevertheless, I will have to be satisfied with FIFA for the next 4 months.
On a completely different topic.. Drucurl AC Milan needs a change in the starting eleven. And I think Andrea Pirlo's the problem, in my honest opinion AC Milan would do better if they replaced Pirlo with Riquelme, and after doing this signing a world class striker. Andrea Pirlo is just too plain, he doesn't dribbles his way through the pitch, he's not offensive enough!! On the other hand, Riquelme is not very fast, but he can certainly dribble his way through defenders and he's also very dangerous at shooting. I think Riquelme haves the offensive Andrea Pirlo's missing/lacking. And by the way, I know you'll disagree with me, but it's something I've been noticing about Milan's game.