Well then, if X11 is not fast on GPU, we wont see it too. But in my experience, the GPU one is VERY fast; X11 is just too slow on CPU when compared to Quark.
With Quark buying a GPU is kind of pointless. You can buy 2 i7s, overclock them (it has unlocked multiplyer) and get 2MH/s; then we have the cloud.
As of ASIC, my logic is that making 11 hashing functions will be very difficulty when implemented in hardware; Quarks's algo maybe harder but X11 is hard enough to not see an ASIC for a long long time.
Maybe scrypt-n, but I'm pretty sure making an ASIC is easier cause we just need to modify the scrypt ASIC.
Both Quark and X11 are 'hard enough' that you will not see asics for either for some time unless there is a massive incentive to do so (ie quark/dark goes up 1000x in value). But when they do it will be easier to make one for X11 than Quark algo.
Have you tried mining Quark type algos with a GPU miner?? I think you haven't. It is VERY fast AND older hardware kicks butt. I get up to 2.7Mhash/s with a single Radeon 6970 and it is so energy efficient that that card only pulls 100watts when mining quark algo (compared to ~300 for scrypt) and runs cool as a cucumber (quark 55-60oC...scrypt 85oC). A Radeon 6970 is a hell of a lot cheaper than 2x i7 (+2x motherboard etc etc). Also for other hardware info I get ~2.3Mhash/s from an 5850 and 2.1 from a 5830. The kicker is I only get 1.7Mhash/s from a 7970... [these values are from Smelter]
X11 algo is overhyped. Quark algo is underhyped. Quark algo kicks ass.
. We're up to just under 5.4 million now!
I was lucky. 
