Please, help me choose speakers for my Graaf GM200

the only component in my current system that has not been upgraded are my speakers, B&W Nautilus 803s. I feel like that is my only missing link to a new sound. I have had these for a while and I think that they are a bit too bright and lack the bass in my set-up.

thus, my question: what speakers should I get?

the system as of now:

Audio Aero Capitole MKII CDP
Sonic Frontiers Line-3 preamp
Graaf GM200 OTL amp
B&W N803 speakers (to be replaced)

all components wired with Stealth calbes (PGS, H-MTLs, C-9...) and plugged into two Equitech 2Qs.

thank you in advance.