I bought a Mr. Pink frame/fork this spring. I'm very happy with it so far (about 1200 miles). I got the 55 (i'm 5'11", 255 lb). It was just what I was looking for: a comfortable and fast road bike that could run 700cx28 tires. Handles very nice, stable, yet responsive. I did a century on it this summer with no real soreness or discomfort. It is stiffer than I expected. I don't notice any frame flex when climbing out of the saddle. Not heavy, but not feather-light either. Traditional, classic, well-built steel bike.
I'm still luke-warm about the PF30 BB. I think it adds to the frame stiffness, but it really limits choice in cranks if you are building one up. I thought (wrongly) that I would be able to install an English to PF adapter and use my old square-taper crank, but found out the adapter doesn't work with traditional (non-exo) bottom brackets. Something to consider if you are looking at the frame/fork option. I expected the paint work to be better for the price, particularly around the color transitions. No one notices except me.
I can't comment on the right size for you. I was in between the 52 and 55. The LBS guy and I agreed up to the 55 was a better fit. The seat tube angle is pretty upright on the Mr. Pink, so may want a few mm more saddle setback to get the position and balance you need. I run a 90 mm/6 deg stem flipped up with 40 mm of spacer. The uncut steerer is really long and strong steel so it can accommodate any height you need.
As far as what else I looked at, the short list ended up as: the Soma Smoothie, the Surly Pacer, and the All City Mr. Pink. The Pacer was the first to come off due to the short head tube. No dealers carried Soma or All City in my area, so I was prepared to buy a frame unseen and unridden until a friend told me he had a friend who owned a shop about an hour away which stocked All City, and the owner loved the Mr. Pink. I test rode a built-up Mr. Pink and bought a frame/fork the same day.
Good luck with your decision. Let me know if you have any questions.