Lightweight FW for turbo cars, How light is too light?

[JFarhanbod]

Finally saved up the money to pick a clutch setup and I was wondering which of my 2 options would be better?
There's a JBR Flywheel (10lbs) and F1 Racing (14.5lbs)
From what I understand turbo cars like a heavier fw since it stops the rpm from dropping down as quick which equals more spool. If you had the option which one would you go for? Keep in mind that it won't be turbo'd for another couple of months but I want to get as much stuff ready now so I won't have to pull the engine/tranny out later.

*edit* It's a M50

[cabriodster87]

This is a little more money, just another option.


NEW - MID WEIGHT STEEL FLYWHEEL
Fitment:
All E36, E46, Z3 and Z4's equip with 6-cyl. M50/M52/M54/S50/S52/S54 engines and OE 5-spd transmission. Will also fit 3-'03-up short imput shaft 6-spd. transmissions with the use of our custom pilot bearing adapter - PN 551-010PB. This flywheel requires the installation of '95-99 E36M3 or aftermarket direct equivalent clutch components.

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520-010-240S Clutch Diameter: 240mm .
Steel. Flywheel Wt. 15.5 lbs.
Order JBR p/n 520-010-240S Price: $868.00