You basically need to decide whether you want to go with their "studio monitor" series or their "domestic" series.
For Studio monitors, the 44xx series from the 80's is a good place to start.
For Domestic, I like the xxTi series from the 80's.
If you are prepared to source gear from Germany, France, etc. you will generally find it is cheaper than it would be in the USA. I have seen some great gear on German eBay go for less than half what it would fetch in the States.