I put progressive springs in my 2003 1100 spirit and they work great. Not the brand you just displayed though, I have no experience with those.
I used these: http://www.progressivesuspension.com/product/1465/fork-spring-kit
They appear to be similar. and you probably are wanting to limit shipping costs. You may want to look at the rear shocks if they are still stock and have a lot of miles on them. I used the 412 series on the site I listed.
Fixing the suspension was a huge upgrade on the motorcycle.
I used these: http://www.progressivesuspension.com/product/1465/fork-spring-kit
They appear to be similar. and you probably are wanting to limit shipping costs. You may want to look at the rear shocks if they are still stock and have a lot of miles on them. I used the 412 series on the site I listed.
Fixing the suspension was a huge upgrade on the motorcycle.