My favorite profiles I use are M Britt Profiles, but I've always been wanting to change the cabinet and speaker to the appropriate one for the amp. I've heard many positive reviews about the OwnHammer IRs over at the Axe-FX forums, so I decided to try it out on the Kemper. I downloaded the new Ownhammer 1966 Marshall 212 Multi-Speaker Collection, which includes 64 different speakers to use. I loaded up my favorite profile from M Britt, the "70 Marshall SL 4" and I switched out the stock cab and used the OwnHammer G12m Greenback speaker: "OH 212 MAR-66 OH-G12M MIX SP2". I instantly received fantastic results! It improved the tone dramatically. The M Britt Profiles are not DI profiles, but the Kemper does a good job taking it out. I then tried the M Britt AC30 profile with the Ownhammer ALN-UK (Celestion Blue + Silver). Another tonal improvement that provided the chime of your typical Vox sound.
OwnHammer is having a promotion right now for the new collection for $25 and will go up to $50 on 6/14, so I highly encourage you to download it! I am really hoping that M Britt will include DI profiles for future releases because I really think his profiles with Ownhammer IRs will create the ultimate tone