Newbie, but learning- my vintage system

I know I am the one that my system has to please, but I would like your feedback on my system. Thoughts, suggestions?

I have recently (4 months ago) gotten interested in upgrading my vintage system from a Marantz 2252B receiver, Klipsch KG4's, Thorens TD160/Linn LVX arm. All of these have come from thrifts and local sales. Total investment was $200 and satisfied me for a couple of years. But then I began reading Audiogon threads and I yearned for more.

Current system:
McIntosh MC40 monoblocks
Altec Model 17's (604 8G's)
Sansui 1000A (using as preamp)
Thorens TD160 like above, except I have done a few cheap mods like dampening and such.

Surprisingly the McSui sounds really good to me. The MC40's and Sansui have both been gone thru and restored. I thought my Sansui would likely be a weak link, but it is very nice. It seems to have an excellent tuner and phono outputs are very adequate for my MM and HOMC carts.

I think down the road I will be asking and looking for suggestions on a preamp, but for now I will listen to what I have.

I am surprised what $950 could buy. Since I have little extra money for audio, I have focused on vintage items only.

Any thoughts on what preamp I might keep an eye out for? It is never too early to begin looking for a good deal. But for now, I have a smile on my face that won't seem to go away.

Thoughts and suggestions appreciated.
Steve