Rms or magnumforce front suspension kit???

In the early stage of building a new toy, looking for serious handling abilities, 500+hps, high cube small block, back to a Tremec and full float rear 9 inch, sorry guys, dont care for 8 3/4, too much hassle, way cheaper to build a 9inch + already have a brand new grand national rear end, complete including a Gold trak, looking at RMS and Magnumforce coil over, complete suspension kits, which one and why????????

and is there anyone else making a quality complete kit????

not talking about a parade car, but a very serious daily driver with occasional blast on a road course, definitelly looking to kick some Porshe club heynnie.....
Dodge29