Wait wait. Before you attempt an upgrade...
Have you tried sharper blades?
A DE89L with a tame blade is smooth but not a BBS machine for me..
A DE89L with a sharp blade is a dream. BBSs without irritation.
Try upgrading to a sharper blade. If upgrading the blade fails to inspire.. have you tried a slicker soap or cream, or more water? My DE89L allows for a more moist lather as it needs less cushion. It loves slick lather especially MWF, EJ Sea Buckthorn, Valobra stick, and Cella.
I guess what I'm saying is that you can allow the DE89L a more aggressive shot at your face with a sharper blade and more water in the lather and still be safe.
If those adjustments fail to inspire you, then perhaps a Merkur 45 Bakelite or a 1912 Junior SE with a fat handle might be worth adding to the collection.
r41,DE89L,45,38c,22r,1912 JR;Iridium,PermaSharp,Astra SP;CF Lime,Cella,MWF,Pacific,Tabac,VDH,Arko