Need assistance in buying new speakers!!!

[Hi Def Cow]

Alright, so here's hoping you guys won't laugh me out of the forum, as I get the feeling from some of the topics you guys are discussing that I'm about as uninformed as one can get, but... I'm looking to finally upgrade my speakers. I upgraded my receiver several years ago and have been very happy with it, but I've been using it with (admittedly decent) HTIB speakers from an older set.

Now Amazon has this on sale, and I'm reaaaaally tempted at that price and with some of the reviews it has:

http://www.amazon.com/Jamo-426-HCS-W.../dp/B003GGXGU6

Now in reading those reviews, I've noticed that it's starting to get into how many Ohms the speakers are rated for and such. One review mentioned that one reason some of the other reviewers may not be happy is that their receivers are set by default to 8 ohms.

Alright, confession time: I have no idea what an ohm is. I've tried to read up on this stuff, but every time I do, within a few sentences they've gotten so technical that I'm completely lost. *If* I'm understanding this stuff right, I take it an ohm is basically how much power these things suck up?

So I looked at the backs of my current speakers and, sure enough, 8 ohms. Now I'm trying to figure out if my beloved receiver is capable of working with these speakers. I dug through the whole manual and the *only* mention I see of ohms and compatibility is on one of the very last pages.

I have a Denon AVR-590. The page that mentions the ohms bit is the attached file.

So that's everything! I'm trying to figure out if I can drop $170 for a spectacular (compared to what I currently have) set of speakers, and if they'll actually be compatible with my current system. I got lucky when I initially bought the receiver and hadn't ever even heard the term "ohms" and that everything ended up working. I don't want to buy a new set of speakers now and have it turn out to be a waste of money. Any and all pieces of advice are appreciated gentlemen!