Which Monitor series do you own?

Purchased new in 1989 Monitor 10B's

3 pairs of Monitor 70' and I just got an Onkyo TX-NR609 have not hook up everything yet, but will soon! Just want someone's opinion on if I got the right receiver? The TX-NR609 my fianc? got for my B-Day, but I was looking at TX-NR809 or TX-NR709 SO my question is am I off to a good start and what center do I need CS1 or CS2 thanks for any help or guidance in my crazy venture.

100 watts is a start. the 809 would probably better for these since it's 35 more watts for a 4 woofer speaker. how big is the room?

I own a pair of Monitor 5's and in the process of restoring a set of Monitor 10B's.

Monitor 40II

I have a pair of Monitor 4's.