Struts/Shocks, upgrading to Sport

I have one nearly blown strut, so i figure is just time to replace them all. I've been doing a lot of shopping around to find the best prices and have come up with Bilstein Sport Struts - ea.$125.31 and Bilstein Sport Shocks ea.$86.79, costing a total of $424.20, not too bad huh? Then I also got a quote for H&R Springs for $239.00. After reading about this in some detail, i think I can do the job myself, of course right after get an alignment. What does everyone think? Is there anything that I should know about before going about installing all this stuff??
Thanks