Hey mate clean 30 :)
I personally like the wheels you have on it now.
You can get NEW lowered king springs for the front at a reasonable price. Check on the left hand side of Rolla clubs homepage in the Sponsors section, something a rather Suspension blah blah.. he/she sells lowered springs for the front for around $125 a pair. So check that out.
Also an option instead of blocks, you can get your leafs reset, which some people seem to find safer, but it comes at a cost I'm pretty sure, i got a quote for $350 for resetting the leafs. NEW blocks would set you back around $100 ishhhh depending on who you go to.
Anyways thats my 2 cents :)