New 197 Alloys

im interested in either getting a set of Sparco alloys or the team dynamics pro race alloys. im a bit of a novice at this but they are both giving options in 7.0 or 7.5. which one should i be going for??? what would be the best ET for both the above widths??and....... im transferring the tyres over from my normal 197 sport wheels (the silver ones) will these go straight on with no fuss??cheers
 
Well standard wheels are 7.5j and they are 8j so imagine theyd poke out a fair bit.

Im no expert though. The two links are the same btw,
 

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