wrt to klipsch's multimedia speakers, they are good. i own a pair of gmx 2.1, but they arent that good. i also own the IFI, and thats about as good a smallish 2.1 will ever get.. and it aint that small. the sub is pretty darned accurate (the gmx sub has port flair issues when turned up) and the rsx-3 sattelites are very good. i also have audioengine a5s, and they are much more accurate than the klipsch, but do not have low end grunt of the IFI unless paired with a sub.
if i had to have a choice between the two, id take the a5s.
cant comment on the other speakers mentinoed so far, but in my simple minded way of looking at it, theres hardly a 2.1 multimedia kind of set up thats going to be better than the IFI. so, id just step away from that genre alltogether and look down the self powered monitor aisle for something better if the budget covers.
sometimes you simply cant believe some of these websites reviews.. they are utter rubbish. for eg, try searching which of the following is the best!
1) boston acoustics receptor hd. (the older version, currently discontinued)
2) cambridge radio 730
3) tivoli radio 2 with sub.
i'll summarise.. most sites will swear on the tivoli, other upstart sites will say the receptor sounds better than the tivoli and cost less too. and the 730 will be here and there...
the fact of the matter is the 730 trounces both the tivoli and the receptor. i own all three. they are all good, of course, but the 730 is best. its all relative.