Welome to ARC ! You're going about it the right way, research, read all you can and ask questions. I have been doing this on and off for 35+ years and still research, read alot and ask questions. I use T5s and am very happy with results. I also thikn a 9.5 will be overkill a 5 or 7 for return should be planty with some powerheads in tank for flow. I use a Mag7 in my 72 bowfront. Abyway take it slow and good luck.