I completely agree, Heavy is important. However, Dont forget alot of wheels find strength in the extra weight. I agree forged wheels accelerate better, are stronger, but are VERY expensive.
Whats your target wheel/tire combo weight?
Heres a few of the ones I had on the Dub to give you an idea of what somethings weigh.
OEM 17" Long Beaches and tires are 52 lbs each.
My 18" BBS RS-Gts (2pc forged) and BFG KDW2s were 42 lbs each,
my TSWs in 20" w/ Nitto 555 were 56 lbs each
my 19" Roja Kruzz and BFG KDW2s were 58 lbs each
my 19" Exel DL-46 w/ Hankooks are 56 lbs each.

Also, BBS, and Centerline both quote rotating mass as 1 lb rotating is equal to 8 dry and stable. Also, 10 lbs dry and stable equals 1 hp. (.8 whp recovered for every 1 lb of reduced wheel weight that is on the drive line.(Not 4 wheels, 2) Drop to a 17 lb wheel, losing 5 lbs each wheel, x 2 wheels = 8hp. Not bad, but alot of $$ for 8 hp....especially if you have heavier than OEM rotors...you may be giving it back up.
I only posted for info, not argument, I support anyone who wants performance at almost any cost...my kinda guy!