What I recommend whatever you decide in is to make sure it has dividers. This will prevent your cymbals from rubbing and scratching each other.
I went with a Zildjian backpack style bag with enough dividers that I can pack all of my cymbals and none are doubled up except the hi-hats but they have their own compartment.
I am sure there are a bunch of good bags this is just what I personal decided on.
I used the very basic Zildjian bag for years with no ill effects- no scratched up cymbals, no problems. In fact, the only reason I changed is because I started to overload the bag with all the metal I was packing in there... so I picked up something a little more heavy duty.
If you're not gigging out that much, there's no need for anything huge and hardcore.
Yeah, I only carry three cymbals plus the hats so it's fine for me, but if you use a big cymbal arsenal I guess you'd need something much bigger and more "substantial."