Subject: about stadium expansion

any experience player can tell me which type of seat is better to upgrade? terrace, bench or seat?
now i got 500 ++supporter and meet the 3100 at home match. how many place to expand? (still got around 1mil to spend)

bench try to get it to 2000 more if u on a wining strike
(edited)

I'd prefer seats but at the begining benches also could be a good solution

i think to get seat, but it really too expansive, i current can get 1000 seat :S