I'm looking for a very similar configuration to you as well. If you are trying to get this for around $50K, you may consider Euro delivery as an option, airfare/etc. notwithstanding.
I am waiting to see what the F10 M5 will be at to see if I will reach for that one, but I find the N20 engine inspirational with a great performance/economy mix. I know it won't be like the beast in my garage right now, but probably enough to keep me happy.
I'd like a jet black 2012 528i/MSport/Premium/Tech and I'll throw in the heated seats and sport transmission. This configuration comes out to $57,695 MSRP. Domestic invoice pricing is about $53K, and my guess is euro invoice is ~$50K. I've seen at least one dealer online that can get you close to Euro Delivery MSRP.
I'd consider dropping comfort access for you. This $1k option only gives you keyless entry, as keyless start is standard. Pushing the button to get in the car doesn't seem too hard, and you keep the keys in your pocket when you get in. In the 3 series, comfort access has more value, as it is only $500, and you don't get the keyless start without it.