Is APower Conditioner For A Mostly Vintage System Worth Getting?

Hi all, I was thinking of getting a used or relatively inexpensive power conditioner for my mostly vintage man cave system.  It consists of a Yamaha CA-810 integrated amp, matching tuner, Ca-500 Cassette Deck, Wharfedale Diamond 225 speakers, Yamaha carousel cd player and a Pro-Ject Debut Carbon turntable. I'm also thinking of purchasing an outboard phono stage as the one on the 810 is not working fully due to probably needing a good overhaul.  I'm going to need more outlets and I have bought a Belkin power strip from miserable Fry's but thinking a power component might be nice here or will the power strip suffice?  What do you guys think? I'm wiling to spend up to around $350.00 used or new.  Thanks for any forthcoming advice.