Stay away from Blackstars unless you get a deal on one and/or are willing to do some modding to get a little more performance. Trust me, I just spent half the night with a 2012 BS240 rewiring, removing and reinstalling parts of it to get it to work "right". After all this time they still don't know how to ground the frickin things though at least they use wire fan covers for better airflow. Can't speak for Pro Grows but they do have their fans and seem to be a better panel.
Area51lighting.com is having a clearance on their remaining panels, they have some smaller panels that might fit your tent. Email them for the clearance code, could be a good deal and be a better long-term investment since they may have an upgrade package for them later on this year. Good Luck and Happy Growing!