anything else out there in the $8000 range
@bms72 You’ll need to figure out what beats what...
Take a look at High Current amps. They will control (grip) your Graham Audio LS5/8 better and result in (I believe) better outcomes.
T+A comes to mind for a high current solid state option. Though not often listed, the PA 3000 HV integrated can be found used, close to your listed budget. Given the Graham’s ’signature’ it would offer a balanced pairing.
There is a MasterSound Evolution 845 integrated listed on usaudiomart for 10K. That (in my estimation) might be a terrific tubed option.
Note: these are options I’d consider with your speakers. Not knowing your preferences...well you know....