Well I have MVP 2004, and I've played about 90 games. Jeff Kent has 41 HR's, but the rest of my team is normal, like around 10 or 15 for guys like Abreu and Beltran. For some reason, if you give Jeff Kent a high fastball, he's goin yard. Same with Craig Monroe against lefties- it's like clockwork, especially in AAA. But for most players it isn't like that. And there are so many slider options, like pitch speed (You can make it seem like the ball sis coming in at 150 MPH - I play on this mode for a challenge.), contact rate, power level, etc etc. So if you're hitting too many HR's, lower the power of all hitters. Too high a BA? Lower the contact level. Altogether too easy? Change the difficulty. Everything is customizable.
The dynasty mode is awesome, and I'd definately recommend MVP 2004. Building a team with a certain budget, keeping players happy by giving them playing time, promoting them to the next level of the minors if they're tearing it up, and watching minor leaguers turn into stars. It's awesome. I can't wait til I finish the season to see what options I get for the off-season. I don't know about the other games, but I can't imagine them being much better than MVP. Other than graphics, which won't be improved much until XBox 2 and PS3, there isn't much to improve. Although once in a while, it will send an eMail to me saying so-and-so has just been the first player to hit 10 HR, and is on pace for X amount, when the league leaders are at around 20 HR. I don't know whats up with that, but I wouldn't not-buy the game based on that. Rent it first, and then if you like it, buy it. I just bought it the day it came out though
"Jack, will you call me, if you're able?"
"I've got your phone number written, in the back of my Bible."