Your positioning is fine mate..both of those running together gives you enough flow to support even sps in future...
sand is not being blown around either and you've got good surface turbulence as well so you'll be fine.....
If the flow is too much simply remove the smaller of the two and at 1350 gallons per hour the other one will give you a flow suitable for all softies and lps corals
ooo nice tall tank there , perfect for reefing up now i'd say...if your p/heads start to suck in air from the surface, simply drop them down about 2 inches and angle one up slightly towards the surface to maintain the turbulence