Well, I haven't heard this particular combination of gear, so...I can only comment on each individual piece:
DPA 4060
These mics are well-known for producing fine recordings. Do you plan on open or stealth taping? If stealth, they'll probably work fine but will suffer from crowd noise as all omnis do in a stealth environment. If open taping, you may want to consider cardioid mics - much more versatile.
Mic2496
Not a clue, as I haven't used or heard one yet. In fact, I'd be surprised if anyone has heard much less used one.
JB3
Lots of folks use the JB3 here with good results. Seems like a great way to go right now unless you can find a deal on a low hours, low cost DAT. Search the archives, though - if you have to convert coax > optical some people have run into problems.