I'm in a bit of a budget conundrum... Here's the deal:

I just got a good deal on a used high-end full carbon bike that came with old Look ARC pedals, just for the sake of having some pedals. I figure instead of buying cleats for an outdated model, I might as well buy new pedals. I already have a mid-range aluminum bike with SPD pedals for daily commuting and training, but I don't like SPD pedals.

I want to have the same pedal system for both bikes. The carbon bike would be only used once a week on weekends. Should I:
1) buy 1 set of high-end pedals for both bikes and just swap them on the carbon right before I ride every weekend
2) buy 2 entry level pedals for both bikes
3) buy 1 set of high-end pedals for the carbon and swap cleats right before I ride the carbon bike
4) ??? you tell me

High-end pedals would really "complete" the bike, since everything else is high-end, but at the same time, I'm afraid of damaging the crankshafts over time from weekly installations of pedals if I go with (1).

To be honest, I'm torn since I'm not a weight weenie by any means, but at the same time I bought a really nice bike so I might as well go all the way... What would you guys do? And what kind of pedals would you recommend?