I would choose red if you don't want to spend extra on paint colour. Blue is ok but not worth what they charge for it,
especially with so many Biritsh Gas cars in that colour which really cheapens the most expensive colour.
Track Grey with Anthracite colour wheels would look mint I think. Having said that I saw a white MK2 LCR with white wheels and side skirts last week, and it looked awesome too

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Best thing to do is to go out your way to see which colour you like best and go from there, and bear in mind metallic costs more than solid colour to the point that you could get another option for the same amout of money.
There is a nice gold/bronze metallic colour out there now too which I would have considered other than the Speed Blue I chose.
The only colour I don't like and would not have is yellow (sorry froggy) as its a marmite colour and as far as I know, yellow tends to be worth less and is less desirable at resale.