Things settled here. NAS4free proved to be fabulous. Stable. With regular updates steadily improving on visible cosmetics which gives me confidence in behind the scene work. Very convenient for use. Therefore it is not surprising that I ran out space on the main pool I use to store video files. I also need to add new storage to NAS and migrate photos and Lightroom catalog there. My NAS box found its permanent place on a network shelf in the laundry room. I love the case and the 3- and 4-drive racks are very convenient. And, yes, they look just cool.
HTPC got a passive CPU cooler and the HD rack was removed to free space for it. HTPC is still noisy though - 7k rpm HD and power supply can be easily heard. But when music or movies are played it does not matter. I doubt I will ever install SSD in this HTPC, if only to cut on noise.
Can I even migrate the existing Windows 7 install to SSD? I remember reading that this NVidia disk controller does not handle SSD well. I suspect the main culprit is power
supply fan anyway.