The DeepCool CC360 ARGB and CC360 WH ARGB Micro-ATX cases outperform the competition with an incredible cost to performance ratio. Both feature three pre-installed 120mm ARGB fans for high airflow through a ventilated front panel for improved cooling performance. Although compact, CC360 ARGB cas...
Any smaller than that and you start shooting up in price due low demand, or basically requiring watercooling to be any good at cooling your parts like the Thermaltake Core G3. The other option is a Coolermaster Q500L, but you'd need to mod that case depending ont he amount of air...