I just began looking into getting rid of my 6 yr old pc for a new(er) MBP. If i were to buy a mbp, it would be plugged in 95% of the time it is being used. That being said, does the battery's life still depreciate as if it were being charged and drained on a regular basis? Also, I'm not looking to drop $2500 for a new mb, but i want to have a good video card for the small amount of gaming that i do. any suggestions on a model that wont break the bank?