One thing to be aware of is the sensitivity. The 2205 is 97db, the M series is 103. The M series is twice as loud with the same input. That's one of the reasons the D series is so revered, the sensitivity is high. The 200s with 60 watts sounds twice as loud with a 103db speaker as with a speaker with less than 100db.
I just bought a 215B SPL. The speakers are Sunn SPL's. They look like Altecs, 3 inch VC, cast frame, magnet structure the same. But they are no where near as loud as my JBL D140's. They handle a bunch of power though....but my 200S is still only 60 watts.
I may be wrong..but generally it appears that the higher the power handling, the lower the efficiency. Keep an eye on that when looking.