2x Aquaclear 50 would be my choice. Thatís 400gph total turnover in tank so hits my 8-10x rule. In 40b Iíd probably cut them down a bit.
With 2-200gph you cover more area of tank, less chance of dead spots, each output is a gentler more plant tank friendly 200gph or less output so plants donít get blown sideways and also more small fish friendly. And with 2 filters you can alternate cleanings so bacterial load and filter efficiency stays more constant.
In a planted tank I donít want anything with over about 200gph output blowing into tank, itís just to aggressive.
One AC50 and one powerhead 30 would also cover tank nicely if you set up flows so they work together to get current rotating in tank. That would give you over 9x turnover in tank circulation.