You can get a very nice used system for much less money than it is worth if you are patient and diligent in your search - Craigslist was good to me in the last 2 months and now I've got a front stage comparable to RTiA5 and CSiA6, and side surrounds comparable to RTiA3 (but towers, with somewhat better bass response) - just two or three generations older. But in very very good condition, and they sound spectacular.
So for about the same price as the pair of refurb RTi8's from Polk eBay Direct that Stanley pointed you at, or less than the price of a pair of new Monitor 75T's, I've got fronts, center, and side surrounds one generation older than that, in excellent condition, that are comparable to the sound and quality of the current RTiA line and the RTi's that came before them. I'll recoup another $80 or $90 of that cost when I sell my old satellite system... but I still need to put some $$ into a good sub.
Stanley's giving you great advice; I'm just offering another option. If you're careful, you can get quality used for 25%-40% of the cost of new, or even more-or-less-new from Polk eBay. Just takes some patience and luck. But if you have the patience to pore over Craiglist and eBay listings, or simply save up to buy new, you definitely want to look at RT/RTi/RTiA series speakers over Monitors and TSi.
If you really don't want to go with the RTi/RTiA's for whatever reason, don't forget to consider the brand new TSx line, which looks to have incorporated some of the RTiA design elements into the TSi line at prices just a bit more than current TSi pricing. Nobody's heard them yet though, to the best of my knowledge...
I bought my RTi A9's as open box and had fantastic savings from the dealer. Good deals like that can be had too. Previously I owned RTi A7's and really enjoyed them. My opinion on the line is that is really amazing speaker for the $$$. I agree with you, well worth trying, because so many good deals can be found with a little hunting