AnDy R

ok so im putting an ls1 in an fc rx7, and im trying to figure out what kind of exhaust im going to have made. i will be putting in a 224/224 cam an ls6 mani and ported tb. im using jtr long tubes and i will have cut outs right after both headers, now i want it to be fairly quite so i was thinking flowmaster, or something simallar...now should i run true duals, x pipe, y pipe or and h pipe? what is better, cost isnt much of an issue because i have a buddy that will hook me up with the price...thanks in advance