Should I try to improve speakers at $2000.00 range

I'll take a different approach - and largely steer clear of the value debate (new products vs old products/technology advances vs. high end price inflation) - and point out that you can probably add an octave of bass extension to your system (even in a smallish room like yours) for $2k. I think I remember the SL 700s pretty well - they were very good speakers and, though they had better extension than the 600s, they still came up short in the bottom end.

Johnny's Vandy recommendation would definitely get you better low end extension, but so would carefully chosen subwoofers (with a controller).

Personally, I suspect that $2k, carefully spent either way, would pay off for you. I know it would for me.

Marty

BTW, in addition to the Vandys, there are many other $2k replacement speakers that would also get you more bandwidth than the SL 700s. Many small $2k floorstanders (I own the very fine omnidirectional Ohm 100s, which are one example) are available to do that trick.

Marty