Help Me Select My Next SPS!

[IronChefItaly]

I seem to be on a streak lately and I was thinking of testing my luck with a tougher SPS coral. I am currently considering the following...

ORA Hawkins Echinata
Forest Fire Digitata
Green Slimer
ORA Red Planet

I run a mixed reef with a heavy emphasis on LPS corals so choosing an SPS that doesn't rely on a SPS dominate or ultra low nutrient system is key. The location receives medium flow and about 300 par next to a 7" colony of seriatopora. A taller or less full (as to not create a shadow) profile is also preferable. Any thoughts, experience or advice is welcome. As always, thanks for reading!

Parameters...
Salinity - 1.025 SG
Temp - 86 F
pH - 8.05
Alk - 8.5 dkh
Ca - 420 ppm
Mg - 1350 ppm
PO4 - 0.04 ppm
NO3 - 1.5 ppm