Which Leaf Springs to match my Torsion Bars?

I was just about to pull the trigger on MP XHD Leafs then use a 1-2" lowering block when I ran across this site a site that gives the notion that matching torsion bar rates should somewhat match leaf spring rates for the best ride quality. I want the best ride quality!

I have PST 1.03" Torsion bars and it doesn't say the lbs the bar is.
http://www.p-s-t.com/pc-4708-177-ply...r-1960-76.aspx

Are they 300lbs? Or what?

Are MP XHD's already the perfect choice? Or Hotchkis?

Or Oval Track springs? If so, which ones?

I plan on using Hotchkis Bilstein shocks and 1.125" front and 7/8" rear sway bars.

Thanks!