Computer update as my 6 year old laptop wasn't really up to date. NH-L12 in the low profile mode works quite well with the SFX-L power supply. The included 120mm fan from the CPU cooler was used as a case fan. The CPU rarely ever goes up to 60 degrees, which I consider very good for a case this big.
Installing the GPU was a bit fiddly as the power connector was putting a small sideways load on the card. Bending the cable next to the connector solved the problem. With an open design cooler, the card does not go above 75C during long gaming sessions and the fans stay off during idle.