You'ld be better off going with Pentax DCF SPs, either in 10x43mm ($440) or 10x50 ($500). You can spend $1000 more and get a little better. I believe Steiners are overpriced for what you get, but those are in closeout for about $270 which makes them worth considering. They have plenty of eye relief for eyeglass wearers but aren't going to be as good in low light than a lot of 10x50s.
Have you considered a roof prism binoculars? Roof prisms are less bulky than porros.
If you are looking for 10x50mm roof prism binoculars under $300 I would look at the Celestron Noble (newer phase corrected model) which come with a lifetime no-fault warranty. Check them out at EagleOptics.com Otherwise you are kind of limited to porro prisms. For 10x50s the Wind River Mesas, Bushnell Legends and Nikon Action Extremes come to mind.
If you can spend up to $400 Wind River Olympics 10x50mm would be available.