Forge cranks can be really expensive for a decent one. They are not necessary unless your going really big 800+. I would get forged rods and pistons and re-use the stock crank. Use ARP bolts for the rods and if you have extra money the head bolts too. Later when you have more money upgrade the supercharger. The eaton blowers will not overpower the stock crank so you will have room to grow. I think you may be a little conservative on your hp estimates.
My I have a few friends from digital corvettes in AZ with eaton/TVS
LS1 W/1900 ~485 rwhp
LS2 W/1900 ~550 rwhp
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2007 C6 z51 416ci, KW variant III, Wilwood WS6, Traqmate.
2005 F-350 PSD 4x4 DRW Lariat
2013 Mustang GT Grabber Blue, track pack, Brembo, Recaro, 3.73s
2009 Jetta Auto 2.5 liter
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