"What are its hardware holding capabilities?"
- motherboard up to e-ATX, 2-3x 5,25" bays, at least 5 HDD bays, 8 expansion slots
"Are you looking for a silent or heavy cooling chassis?"
- balanced, something in between... I have Silverstone Fortress 01; I bought it because of positive pressure cooling. It has sturdy frame and it's also quiet enough.
"Style or Functionality?"
- as for the style, what do you mean by that; simple vs. extravagant? I'm quite conservative about style & design; definitely not something like this terrible thing: Thermaltake - Global - ARMOR REVO GENE Snow Edition - VO800M6W2N
"what would you pay for it (Other than free )"
- not more than 200 €
It's not, that I'm dissatisfied with my FT01, but: If I was to buy new case now, I'd consider these two:
Silverstone Fortress 02
When I bought my FT01, PC-90 wasn't produced yet. If it was, it's likely, that I would have bought it; I really like the idea of HDDs being installed in such way, that the airflow from front fans is not obstructed (well, FT02 is conceptually similar, bur aslo much more expensive). Something similar is multi heat zone in e.g. x2000fn, but we're discussing mid tower here...
I hope you'll find my view at least a bit useful. :-)