98vert6spd

I have this case

case

im having some heat issues
my case is running around 40 c while the proc is at 44
the case gets up to 42 when under load
this is using the motherboard monitor im assuming the lower numveri s the case and the higher is the cpu so correct me if im wrong

anyway
i have a nice psu antec tru power 430w thats quiet and 4 case fnas in the front of the case i orderd more to fill out the rest of the spots in the case but heres my question

are doing case mods a bad idea?
mainly id like to put 2 or 3 fans in the cieling of my case because i just dont see a good way to solve the heat issues
other than maybe bolting about 10 fans into the plexiglass window?

this case is not cooling friendly i bought it cause i like the color and never had heat problems before

short of buyinga new case what are my options?
assuming there are no good options what case would you recommend
I dont want neons and i dont want a psu
I also dont wanna pay a damn fortune for the case but itd be cool if it looked nice
so... after all that what can i do?