Difference between normal ATX mid tower and E-ATX full tower is this:
http://www.pc-experience.de/Bilder-Reviews/Lian6/lian.32.jpg (PC-B10)
http://www.pc-experience.de/Bilder-Reviews/Lian44/lian.32.jpg (PC-A70/71F)
HD5870 might be very tight fit in PC-B10... and with any kind gaming graphics card there goes the working space.
ATCS 840 has similar space to PC-A70.
Corsair H50 should fit to any case with 12cm fan near CPU
For PSU there just isn't much sense in getting PSU with fixed cable spaghetti especially if you're not going to need that many connectors for drives and devices.
Those jet turbines are reserved for graphics card coolers so without blocked direct noise escape paths they don't stay quiet in much any use than desktop. (although competed by those "quiet" 1500+ rpm fans used by some)
HAF and other cheese graters are acoustically like non existing wall between apartments and stay quiet only if there isn't anything noise creating in the first place.
Already single direct noise escape path is enough to destroy most noise containing abiltiy. ATCS 840's front cover has edge in there over A70F's open front but again its top is in practise fully open.
PC-A70F's door equipped version A71F is pretty much the biggest available fully silencing friendly case with every feature needed for that and missing only mass damping (easy to add unlike fixing bad design) for getting to Antec P18x like noise containing ability. (for some reason accessing air filters is just lot harder than in original A71)
And don't worry about cooling ability differences. When avoiding "getting Hummer as shopping bag" like bad efficiency parts/overclocking "to eleven in ten leve scale" any modern case with decent design works and proper silencing design doesn't hinder cooling much any... actually allows running case fans faster than with direct noise escape path.
Easier and cheaper to just buy electric heater than multiple graphics cards... it also retains its resale value lot better.
But E-ATX depth guarantees enough space for any graphics card, with good working space still left.
Tool-less is often pain in the neck with 5.25" devices although at least Lian Li's expansion card locking system made of metal doesn't decay unlike common plastic clip.
But Lian Li's replaceable parts and accessories are useful for increasing useful life of the case, I/O port module can be changed for getting new/updated ports and I myself got PCI cooling kit for keeping those three cards happier.
Without need for more HDD bays that's only notable advantage of PC-A70F over ATCS 840.