Nic,
I spent some time nervously reading the reviews for the SC 430 too.
If you read any at all from the USA they rave,whereas in the UK they tend to comment on its poor ride qualities,handling etc,especially Clarkson who I recently watched on TV lavishing praise on the Citroen Berlingo!!
The proof of the pudding is in the eating.I've owned the 911's,MGF's,Panthers,and similar and have traded my LS400 in for my 6 month old SC430.I love driving it,so does my wife.Its in the vein of a Grand Tourer not a track day racer.....and will probably outlive the competitors,which are few in this category.
I've no complaints about the ride;its very smooth,powerful,and refined.If your new one for next year is an improvement you'll be well pleased.Especially since you'll count on one hand the number you'll see in a week.
A plus point is also that it doesnt p**s people off with outragous air dams and aggressive styling,so you get to enjoy your car without tailgating boy-racers.
You've made what I consider to be a mature choice,relax and enjoy....when it arrives!
Regards,
Buzz.