Today Legacy non-combo decks have 4-8 removal spells after SB (like Bolt/Fatal Push in UBR or Decay/Fatal Push in BUG) you have much more lands, and you don't need them in late game. Each good player will keep hand with removal and can dig for an other so mom Summoning Sickness is the biggest issue.
Recurring lands by utility and always decide if you really need that land - your choose - better then not having choose and just lose mom every time it has SS. About black sources - never had problems with it.
Don't forget your main removal swords to plowshares cost 1, also add path to exile. If you really have more diversity you can replace 1 ZP to Deluge. Moms leads to more X-for-1 exchange. Prelate locks their artifact removal which can lead to selflock - we also run almost same equip setup, with option to search by GSZ which can easy dodge lock.
Prelate comes quite late against removal vs turn 1 Mom. Same is true vs decay blowing Vial.
P.S: Still looking for good Writers for primer:
http://www.mtgthesource.com/forums/s...=1#post1020034
we actually have separate hidden forum for primer update.