I still recommend you start with one really nice reliable unit... I think I saw the mini beta unit at LDRS, really cool but is it dual deploy yet?
Anyways the MAWD is fine, can fire what 10 e-matches? I usually use 2 matches per event when using one alt and it fires those just fine...
But I would start with a single unit and it will work fine in this bird....
Then down the road when you want more reliablity (most likely when building a new larger rocket) get a unit like a Gwiz MC2, ARTS, RDAS etc... A bit more complex, but most are still pretty reliable but you will get TONS of data...
And still have that simple 45K, MAWD or RRC2 that you trusted for many single alt flights in there to save the day if the complex stuff fails...
Gwiz has its bugs but the designers are true engineers.... The loki unit is really nice, the guys are not as tech savy perhaps as Gwiz but the unit (especially the software interface) is great... And for $900's you can get the alt with live telematry and GPS tracking!
So yeah I still recommend you start with one alt and if you are set on two... get one baro and one acceleromic!!! IMPORTANT...
That way not only do you have two units but each detects apogee differently, so if the rocket flight is less then ideal the baro will catch it.... If there is a pressure anomoly etc... the acceleromic unit will catch it... And your 2nd alt should also have more data, but most acceleromic based units do....
Good Luck! That nike is a solid rocket...