DIY amp recommendation for B&W 684 S2 speakers

So im looking to build my first amp from scratch to power a pair of BB&W 684 S2's. I've got quite abit of experience repairing older amps, and I own a pretty complete electronics lab too as im studying EEE at university.

I almost want to design my own from scratch, but at this point i think class AB BJT power amps have little room for re-invention.

Any ideas what so ever are very welcome! thanks!