Single midpipe vs true dual sound difference?

[waahbahbopbop]

Narrowing the tough decision down between all the exhaust systems out there. The top speed pro-1 (single mid-pipe 2.75") is appealing obviously because of price but I don't mind going a couple extra bucks for a more expensive system.

My brother had an 06 350z nismo and put an Invidia exhaust on it, single midpipe catback and I did rather like the sound. So my question is for those that have heard both the true dual and the single midpipe on the z32 and what their impressions are as to the difference in sound(s).

I would like to think that a single midpipe of 2.75" diameter would be better for a little extra back pressure over a 2.5" true dual, and for sound resonation purposes but that's why I'm asking. Is there more of a rattle or rasp with the true dual? Trying to get an exceptionally clean, but pretty loud system for daily use.