I can't find my last posting which detailed my trials and tribulations about doing the same as you (i.e., (paraphrasing) 'improving on OEM exhaust note without the drone'), but basically it's the perfect level now.
From buying the car, my intention was always to improve as much as I could - so I went for a full Scorpion turbo-back system. Originally, I went 'non-resonated' which was a bad idea - it was ridiculously loud with a heavy drone at all ranges, mainly due to empty rear boot space and lack of soundproofing. I contacted Scorpion to get the centre resonator and got it fitted a few months' later, and it solved all problems with drone and lowered the sound to a perfect level.
Having had the car 6 years and the current exhaust setup for 4.5 years, I can honestly say it's one of the best modifications (aside from suspension & remap). It's loud enough on start-up to turn heads (if you're into that), those in-the-know will recognise it's modified at lower speeds, and under heavier acceleration you definitely know about it. Whilst it does increase NVH a little, I'd say it's comfortably within expectations of a modified system - not intrusive or droney, but perfect for a petrol-head to enjoy.
One caveat - turbo-back vs. cat-back - the latter setup won't have the 3" downpipe and sports cat which is less restrictive and (marginally, under heavier load) louder. But in which case, cat-back might be perfect for your needs.