Definitely look for shoes that don't have some sort of strap right at that area. The first that comes to mind is the Speedstar, but those are for races and shorter runs. I think the Asics Cumulus also have that wide mesh area. Look at some Mizuno models, too. However, for my money, Asics have always had the neccesary room in the toe box. Be careful, though. Sometime the more mesh, the more flimsy the shoe. Don't get the Asics Stratus (I believe that was the name). They broke down really fast. Only Asics shoe I never liked.
To give you a good outlook, I went to three different doctors when I was 26 for my bunions. One said have surgery; two said change your shoes, wear orthotics, soak your feet. I chose the more conservative approach. I am now 41, and run as well as I ever did (I remember back when I was 26 one doctor said I had the feet of a 70 year old woman - I wonder how old my feet would be now?). Bunions are the least of my problems right now, injury wise. The key is to find the right shoe for running AND for everday wear. For the latter, I go for the Clarks, etc. type shoes. I don't look near as fancy as other gals, but my feet feel good. Take care of them 24/7. Invest in either a foot bath (pour in some of the vinegar) and/or a foot warmer. You can also buy bunion pads for comfort. Freeze a coke bottle full of water, and roll it under your foot pad directly below that bunion. I would go see a doctor though, for taylor made inserts.
One other bit of advice from me (just personal experience, nothing I got from a doctor)... I never go barefoot, even in the house. I always have some sort of shoe on my foot. Nothing makes my bunions sore like walking barefoot. I know some people claims they cause PF, but I do like Crocs for everyday wear. Lots of room, and a nice soft landing.
Hope this helps.