I have the Beta 20's and the Polk Monitor 40's (little brother of the Monitor 50's but same drivers). Of the 2, I prefer the Polks. The Beta 20's I bought at Comp usa for around $160 after shipping.
http://www.compusa.com/applications/...069&CatId=4598

But those Klipsch KG 4's are a great deal( as suggested by 02 audionoob). I have the smaller version, the KG 2's. I like them better yet than the Polks or Beta's. Those KG 4's here in NY run at $350. And they can be upgraded with new caps, and a titanium diaphragms for the tweeters. The surrounds on them are rubber, not foam, so they are more durable.

I think you would get more bang for your buck if you bought used. CL is a good way to go. Newer isn't always better.