P-Audio preneo-750n

am lookin to build 4 mt121 with paudio SN12B 2 for now an the nex 2 later to put over my 2 dural HD kick bin ...
the driver am goin to use is the PreNeo-750n (cause am gettin them at a good price)but cant deside whats the best horn i should used in my list
1--B&C ME60 $110us
2--Paudio PH2723 $95us
3--Paudio PH4530 $120us
4--18sound XR2064 $125us
or maybe u guys can sugest me some i can find in the us around this price range
thanks

me60...... smiley20

ok thanks bee
from any one else????

What is all this PRE Neo? Is that just a name or does it imply not neo?
Ta