Best shocks in my opinion are Wilbers. They tailored a set for my Seeley, 30mm longer than stock, fully adjustable. Ohlins are great, too.
Every shock with the stock dimensions will not be an improvement regarding ground clearance, if you really want to RIDE. If you don't care about these things, it doesn't really matter which brand, just go with the one that looks right for you.
I know a few guys that raced {sucessfully} with both Hagon and Ikon {Koni} as well as Ohlins and others mentioned here, i think for the street, with all its limitations, you would have to be a very good rider to find any perceived limitations of the shocks, never had any problems with damping on Ikons and besides they are easy to rebuild or just add higher viscosity oil. I have also heard others that think they are quite hard {as opposed to soft} on the damping side, set them up to suit yourself, also Ikon will answer any questions you have, they are far cheaper than Ohlins and Wilbers. Lots of guys on this site use them as well.... There's also a couple of guys here that race with YSS shocks, do a forum search and have a read...
I'll add, i am going to use Ohlins on one of my builds but thats purely for a look i am trying to achieve, i had some fast 750's in the early 80's and rode them very hard, often making my mates 900 Kawasaki look average..
all on Ikons or Koni as they were known back then. All of the shocks mentioned {except maybe progressives} are quite ok to ride relatively hard on, it will ultimately boil down to what you find acceptable to spend on a pair of shocks......