Of course the 5030ub is long discontinued so are new one even still available? Buying refurbished or used can be a nightmare but Epson does have a decent warranty on their refurbished projectors as you may have to send several back. The Sony 45es is known for its excellent motion processor and should be great for sports. Sports are one of the lesser demanding content for viewing and are generally broadcast in 720p or 1080i if your lucky so video processing is very important. The Sony has higher native contrast then the 5030 but no active iris so dynamic contrast is better on the 5030 if you don't mind the action of the iris.
"Smart enough to know better, to old to care" ------ Dedicated Bat Cave Home Theater, JVC RS49U/Mitsubishi HC7900DW Projector, 110" 16:9 Jamestown screen with variable power masking for CIW 2.50:1 to 16:9, Marantz 7009 with 7.1.4 Atmos with Ohm mains,3 DIY Subs (2 15" (1 ported, 1 sealed and a 12" 4th order bandpass), 1 DIY butt kicker, Custom Built HTPC, 18TB DroboFS NAS