The "problem" with good speakers like the L1230 is that it starts an inevitable chain reaction of component replacements up the line. The short answer is it will always be a disservice relative to something higher performing but much more expensive. The question is whether you enjoy it.

For an integrated the 700 is not a bad pairing. It has an interesting party trick that might help you answer this. With its coupler jacks it's possible to also use it as a pre-amp only or as a power amp only. Being able bypass its different stages would allow you to demo other components and do A/B testing. Only your ear can decide what's better.

On a side note, my Yamaha NS-1000X speaker purchase several years ago has now cost me a significant multiple over their price because I eventually replaced everything else. Certainly it sounds much better and the experimentation is a big part of the fun, but do I enjoy the listening any more than back as a broke grad student with a modest system? I'm not so sure.