HELP: Olympus Zuiko 50mm 1.8 vs. MD Rokkor 50mm 1.4 (aka didn't expect to win both eBay bids)

Wow, thanks so much everyone for your helpful comments! I wouldn't have had the confidence to go ahead and buy these guys without the knowledge that I've gained from you folks on this board.

Does anyone have any specific recommendations though when it comes to adapters? I see that a lot of folks use Rainbow imaging and they seem very inexpensive, at the same time I don't want to risk cheaping out and having it break on me either. If the price is right, perhaps I will just go ahead and buy an adapter for both and give them a try.

Cheers!