Ordered a FX Wildcat Compact that I had my dealer upgrade to the longer sniper barrel. With that said the standard hard case that came with it would not fit with the longer barrel so I traded it back and now on the hunt for a good case. I'm sure there are pros and cons to each but what are the advantages of the hard cases over the soft and vice versa. Also a good place to order? What should I expect to pay for a decent case either way?
Like most of the others seem to suggest, I'd go with a hard case (it's what I use for my own air rifles, pistols and accessories that aren't being used on a fairly regular basis). The best case I can make for this is simply to keep the item safe and in tip-top condition. Drop, knock over or otherwise abuse the hard case, with lots of interior foam padding and straps to keep the goodies inside from banging around against the sides (I added straps affixed to the interior top and bottom and cut slits through the padding for them to cases that didn't come with straps already installed) and your airgun/firearm/whatever still should be intact and gorgeous when you open 'er back up.
However, drop your stunningly beautiful, one of a kind, all-time favorite rifle in its soft carry bag/sock/case with what by comparison is practically no padding and lots of wiggle room inside... and off snaps the bolt, hammer, front sight and/or whatever hit the concrete below first, or the scope, laser, flash, bipod, etcetera is damaged or wrecked, and then the loose, busted bits and pieces dig huge gouges out of what used to be a gorgeously finished wood stock, or they scratch up the up-until-then unblemished metal/plastic/whatever receiver, barrel and/or other areas of the rifle and for the big finish, inflict other minor to major damage you'd rather not even imagine. I'm sure you get the idea. ;-)
It's entirely possible I'm overstating the dangers just a bit <ahdem>, but if it's going to be stored even for a short period of time, I secure my toy in a hard case (even a cheapo hard case is better than the typical, quilted bag soft case). Naturally, a soft case still could be useful when traipsing around out in the field and such, but I learned from bitter experience that a hard case provides more protection for my treasured toys than a soft one.

Of course, you should go with whatever works best for you. Good luck!