The first aftermarket upgrade to my ’06 LS650 was the SuperTrapp muffler, P.No. 728-50650. No regrets there.  Then after getting tired of my back being hammered by the stock shocks I decided to go with the Progressives based on this site’s information.  However, unlike most, I did not want the 12.5” shocks that are a full 2” longer than stock causing clearance issues with the belt guard.  Instead I found 11” Progressives P.No. 412-4233C work quite nicely.  The bottom shock mounting eye is offset and I installed this inwards.  As a result the shock is not perfectly vertical looking from the rear and tilts very slightly out at the bottom.  No issue there.  Nothing interfered on the belt side with the swingarm being lowered 0.5” and the only potential issue was the rear axle almost touched the SuperTrapp at full extension.  I added a few fender washers on the mounting bracket to space the muffler out a tad.  So far, so good and certainly an improvement over stock.  But, now I can feel the slight flex in the front forks so I guess a brace is in order there.  Where will it ever end?

Excellent choice.
The thought is:
412-4232C for a soft ride @90/130lb springs  
412-4233C for a firm ride @115/155lb springs  

since you have the 4233C's certainly they perform much better than stock - when you first sit down on the bike do they about the same initial give as stock or just a tad softer?  

the 4232C's are much softer than stock to start
not talking about once you get going then the progressive spring rate kicks in.