Hi jermin,
Well it sounds like your about to buy a new car and not a $30 sim
All kidding aside, if you love ww2 aviation and flight sims its a no brainer, seriously.
As far as the ATAG Axis&Allies server goes the server admins have spent thousands of hours setting up a stable, objective based mission thats alot of fun when your on coms and both sides are fighting for that last objective dueling back and forth for the victory.
Performance varies based on graphic preference but I think you should be fine but getting a 64bit operating system and min 4gb sys ram should be first(biggest bang for the buck), then optimize your game settings to see if a faster GPU with more vram is what you want or need.
When you do pull the trigger come over to the ATAG forums and get teamspeak3(its free) as we can help you in a tenth of the time it took us
and coms greatly enhances enjoyment (teamwork, comradery, wingmen, etc)
See ya in the air!