To keep things cheap and to keep the sound smooth and quiet, buy a glasspack that is 30in long and have a muffler shop weld it in place of the resonator.
The glasspack is basically a resonater and many of us use them in that spot because they are really cheap and affective. The rest of the factory exhaust is perfect, there is no gains to be had from changing anything after the cat converter.
The whole debate about what sounds good for mufflers could spread over 30 pages with every tard coming out of the wood work to express there opinion on mufflers. Keep it simple and stay with the factory mufflers.
As for struts, the FE3 struts are stock on COMP cars and will handle the best. Anything else will be a worse ride per say, not a HUGE difference but the regular struts on the GT and GTP cars are slightly softer and arent the same sorta feel. But switching to them isnt a heart breaker, just the ride could change slightly. FE3 struts are the most expensive aswell.