help on sizing motherboard to case

helpmiplz

Prominent
Mar 5, 2017
5
0
510
so i have bought a new motherboard to low & behold on my splurge purchase not check if my old case would fit it. no surprise it doesn't i was thinking about buying a ATX A21 Computer Case, Mid Tower for my STRIX h270f asus motherboard i would like to know the cheapest case i can go with in order to fit this motherboard & also my best bang for buck thank you!
 
Is size your only requirement for this case? What about the other components: GPU length, cooler height, number of internal disk drives/solid state drives, number of external drives, airflow or silent case, windowed or non-windowed, tabletop/desktop clearances, color of case, required number/types of front USB ports, etc?

If you're just looking for the cheapest, then, these:
BitFenix Nova ($22.99 @ NCIXUS)
BitFenix Comrade ($27.99 @ NCIXUS)
Xion XON-350_BK ($19.99 after $5.00 rebate @ Newegg)
Deepcool TESSERACT BF ($29.99 @ Newegg)