The classic MD421 was my favourite for toms, guitar cabs and bass cab. I never owned any, but I used to rent/borrow for my more demanding recording sessions.
I just purchased two of the compact 421s and I couldn't be happier. I never used the filter anyway, the new body is so small and light I can mount it on standard cheap mic clips. Also, the new mount is better than the flimsy original one which used to break.
The sound is there. I got my favourite full bodied, articulate toms with smooth cymbal rejection. It is always importand for me to check the quality of the off axis sources. These mics deliver in all aspects. After my recent test, I'm definitely getting 2-3 more.