Apple Logic Pro /LogicExpress Discussion

I have a fairly new macbook pro which is playing up - overheating, several 
keys have stopped working, doesn't always start up properly and even so, it 
was my first mac and I fell in love with mac compared to a pc. I am going to 
buy a new mac, with a budget of up to the price of a macbook pro, but I 
don't necessarily need a laptop. 

Could anyone suggest what I should go for within that sort of budget? Other 
than that I don't want an absolutely huge ugly monster of a computer in my 
living room, I want to go for whatever is best for logic pro (including 
recording audio). 

I love computers but haven't got a clue when it comes to deciding what to 
get so any help would be much appreciated. 

By the way, thank you for the help in unmuting the tracks. The live gig went 
down a storm. 

Andy B