no. of leagues/database

any time i start a new game i cant figure out whats best for database size. i really only manage one team in one country so dont need loads of leagues playable cause just dont use them, should keep a couple as view only or use a lot of them still as view only to try and make a "fair" game? tried using the keep top sides from central europe, scandanavia etc option along with others but get the impression could do with more. what do folks on here use? should just ignore the game speed/performance/no. of players quides?

comp is a 3 year old laptop, 1.6ghz centrino duo with 2gb ram if thats any help for suggestions