Order the 1515/2.5D from here:
http://www.rc-monster.com/proddetail...5_2.5dF&cat=20
For battery packs, go with 2 of these:
http://www.rc-monster.com/proddetail...pq3s6000mah25c
And yes, the Castle 2200kv combo in my opinion is as good as the Neu 1515/1Y