Gaunt,
Yautja,
13 years ago
If Xenomorphs fought against Graboids the Xeno's would probably win.
Firstly Graboids cannot see at all (seeing in surface heat? not seen one do that) and they would most likely die if they consumed a Xeno whole (on account of their acidic blood).
Secondly the Graboid is stuck in the ground and can't get to the Xeno (who learns faster than the Graboids), the Xenos will probably stay on high ground and the Graboids would eventually starve.
And finally, if a Graboid managed to survive against the Xenos and grow it will make itself absolutly defenceless against the Xeno's due to its own natural life cycle, (for those of you who are unfamiliar Graboids have two other stages in their life cycle, Shriekers and Ass blasters, both see in heat and are much smaller than the original Graboids giant worm body, they wouldn't be able to see the Xenomorphs due to them being cold blooded and they both will have lost their ability to sense seismic movement around them leaving them completly open to attack).
Well I think that sorts out the who wins against who arguement :)
Now as for Xenos having eyes I'm not so sure, they have been depicted with eyes recently, might be able to make out the tiny sockets on the AVP 3 game case cover.
http://bulk2.destructoid.com/ul/164318-avp.jpg
Look at the Aliens head, look like an eye to you?