Which set up to try?

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I have a 78 vert and am looking to upgrade my brakes.. Being that I am not rich I was looking at the Topline Disc set up for the front and rear, another set caught my eye from Aircooled... My question is that in the future I will be upgrading to a Type IV (I hope) and was wondering if these brakes will be adequate for saftey needs.. Or do I need something like the Vented discs fro CSP which go for about $600, or a Porsche conversion.. But I have not priced what this will run me.. Figure big money
Please help as I am new and in experienced in this area, and don't want to shell out money twice.. Have to pay the Mortage you know..
Thanks
Alex
If I upgrade engines looking at approx low 100 HP's nothing Massive, since I need looking for added torque and reliablity..